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Finding the Fourth Proportional to 519,577.40, 779,366.10 and 342,284.60

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Solution

The fourth proportional to 519,577.40, 779,366.10 and 342,284.60 is: 513,426.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    519,577.40 : 779,366.10 = 342,284.60 : x
  2. Step 2: Convert to fraction form
    519,577.40/779,366.10 = 342,284.60/x
  3. Step 3: Cross multiply
    519,577.40x = 779,366.10 × 342,284.60
  4. Step 4: Simplify right side
    519,577.40x = 266,765,013,792.06
  5. Step 5: Solve for x
    x = 266,765,013,792.06/519,577.40
  6. Step 6: Final answer
    x = 513,426.90

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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.