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Finding the Fourth Proportional to 529,421.90, 730,599.81 and 287,699.90

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Solution

The fourth proportional to 529,421.90, 730,599.81 and 287,699.90 is: 397,024.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,421.90 : 730,599.81 = 287,699.90 : x
  2. Step 2: Convert to fraction form
    529,421.90/730,599.81 = 287,699.90/x
  3. Step 3: Cross multiply
    529,421.90x = 730,599.81 × 287,699.90
  4. Step 4: Simplify right side
    529,421.90x = 210,193,488,624.02
  5. Step 5: Solve for x
    x = 210,193,488,624.02/529,421.90
  6. Step 6: Final answer
    x = 397,024.55

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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.