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Finding the Fourth Proportional to 529,479.05, 730,686.76 and 287,761.65

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Solution

The fourth proportional to 529,479.05, 730,686.76 and 287,761.65 is: 397,114.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    529,479.05 : 730,686.76 = 287,761.65 : x
  2. Step 2: Convert to fraction form
    529,479.05/730,686.76 = 287,761.65/x
  3. Step 3: Cross multiply
    529,479.05x = 730,686.76 × 287,761.65
  4. Step 4: Simplify right side
    529,479.05x = 210,263,624,231.28
  5. Step 5: Solve for x
    x = 210,263,624,231.28/529,479.05
  6. Step 6: Final answer
    x = 397,114.16

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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.