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Finding the Fourth Proportional to 519,219.10, 778,828.65 and 487,726.30

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Solution

The fourth proportional to 519,219.10, 778,828.65 and 487,726.30 is: 731,589.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,219.10 : 778,828.65 = 487,726.30 : x
  2. Step 2: Convert to fraction form
    519,219.10/778,828.65 = 487,726.30/x
  3. Step 3: Cross multiply
    519,219.10x = 778,828.65 × 487,726.30
  4. Step 4: Simplify right side
    519,219.10x = 379,855,215,798.50
  5. Step 5: Solve for x
    x = 379,855,215,798.50/519,219.10
  6. Step 6: Final answer
    x = 731,589.45

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Half scale
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Double scale
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Similar ratio
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.