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Finding the Fourth Proportional to 529,120.69, 730,199.88 and 287,403.19

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Solution

The fourth proportional to 529,120.69, 730,199.88 and 287,403.19 is: 396,623.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,120.69 : 730,199.88 = 287,403.19 : x
  2. Step 2: Convert to fraction form
    529,120.69/730,199.88 = 287,403.19/x
  3. Step 3: Cross multiply
    529,120.69x = 730,199.88 × 287,403.19
  4. Step 4: Simplify right side
    529,120.69x = 209,861,773,024.12
  5. Step 5: Solve for x
    x = 209,861,773,024.12/529,120.69
  6. Step 6: Final answer
    x = 396,623.64

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.