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Finding the Fourth Proportional to 519,817.80, 779,726.70 and 145,792.20

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Solution

The fourth proportional to 519,817.80, 779,726.70 and 145,792.20 is: 218,688.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,817.80 : 779,726.70 = 145,792.20 : x
  2. Step 2: Convert to fraction form
    519,817.80/779,726.70 = 145,792.20/x
  3. Step 3: Cross multiply
    519,817.80x = 779,726.70 × 145,792.20
  4. Step 4: Simplify right side
    519,817.80x = 113,678,070,991.74
  5. Step 5: Solve for x
    x = 113,678,070,991.74/519,817.80
  6. Step 6: Final answer
    x = 218,688.30

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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.