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Finding the Fourth Proportional to 529,700.90, 731,001.66 and 287,999.74

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Solution

The fourth proportional to 529,700.90, 731,001.66 and 287,999.74 is: 397,447.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,700.90 : 731,001.66 = 287,999.74 : x
  2. Step 2: Convert to fraction form
    529,700.90/731,001.66 = 287,999.74/x
  3. Step 3: Cross multiply
    529,700.90x = 731,001.66 × 287,999.74
  4. Step 4: Simplify right side
    529,700.90x = 210,528,288,019.57
  5. Step 5: Solve for x
    x = 210,528,288,019.57/529,700.90
  6. Step 6: Final answer
    x = 397,447.48

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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.