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Finding the Fourth Proportional to 265,710.40, 398,572.96 and 66,022.72

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Solution

The fourth proportional to 265,710.40, 398,572.96 and 66,022.72 is: 99,035.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,710.40 : 398,572.96 = 66,022.72 : x
  2. Step 2: Convert to fraction form
    265,710.40/398,572.96 = 66,022.72/x
  3. Step 3: Cross multiply
    265,710.40x = 398,572.96 × 66,022.72
  4. Step 4: Simplify right side
    265,710.40x = 26,314,870,937.65
  5. Step 5: Solve for x
    x = 26,314,870,937.65/265,710.40
  6. Step 6: Final answer
    x = 99,035.91

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.