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Finding the Fourth Proportional to 529,699.90, 731,000.28 and 287,998.74

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Solution

The fourth proportional to 529,699.90, 731,000.28 and 287,998.74 is: 397,446.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,699.90 : 731,000.28 = 287,998.74 : x
  2. Step 2: Convert to fraction form
    529,699.90/731,000.28 = 287,998.74/x
  3. Step 3: Cross multiply
    529,699.90x = 731,000.28 × 287,998.74
  4. Step 4: Simplify right side
    529,699.90x = 210,527,159,579.65
  5. Step 5: Solve for x
    x = 210,527,159,579.65/529,699.90
  6. Step 6: Final answer
    x = 397,446.10

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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.