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Finding the Fourth Proportional to 529,421.40, 730,599.13 and 287,699.40

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Solution

The fourth proportional to 529,421.40, 730,599.13 and 287,699.40 is: 397,023.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,421.40 : 730,599.13 = 287,699.40 : x
  2. Step 2: Convert to fraction form
    529,421.40/730,599.13 = 287,699.40/x
  3. Step 3: Cross multiply
    529,421.40x = 730,599.13 × 287,699.40
  4. Step 4: Simplify right side
    529,421.40x = 210,192,931,341.52
  5. Step 5: Solve for x
    x = 210,192,931,341.52/529,421.40
  6. Step 6: Final answer
    x = 397,023.87

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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.