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Finding the Fourth Proportional to 519,116.30, 778,674.45 and 485,655.20

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Solution

The fourth proportional to 519,116.30, 778,674.45 and 485,655.20 is: 728,482.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,116.30 : 778,674.45 = 485,655.20 : x
  2. Step 2: Convert to fraction form
    519,116.30/778,674.45 = 485,655.20/x
  3. Step 3: Cross multiply
    519,116.30x = 778,674.45 × 485,655.20
  4. Step 4: Simplify right side
    519,116.30x = 378,167,295,749.64
  5. Step 5: Solve for x
    x = 378,167,295,749.64/519,116.30
  6. Step 6: Final answer
    x = 728,482.80

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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.