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Finding the Fourth Proportional to 529,691.16, 730,988.22 and 287,989.98

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Solution

The fourth proportional to 529,691.16, 730,988.22 and 287,989.98 is: 397,434.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,691.16 : 730,988.22 = 287,989.98 : x
  2. Step 2: Convert to fraction form
    529,691.16/730,988.22 = 287,989.98/x
  3. Step 3: Cross multiply
    529,691.16x = 730,988.22 × 287,989.98
  4. Step 4: Simplify right side
    529,691.16x = 210,517,282,858.04
  5. Step 5: Solve for x
    x = 210,517,282,858.04/529,691.16
  6. Step 6: Final answer
    x = 397,434.01

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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.