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Finding the Fourth Proportional to 438,172.91, 657,292.60 and 118,320.12

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Solution

The fourth proportional to 438,172.91, 657,292.60 and 118,320.12 is: 177,489.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,172.91 : 657,292.60 = 118,320.12 : x
  2. Step 2: Convert to fraction form
    438,172.91/657,292.60 = 118,320.12/x
  3. Step 3: Cross multiply
    438,172.91x = 657,292.60 × 118,320.12
  4. Step 4: Simplify right side
    438,172.91x = 77,770,939,455.01
  5. Step 5: Solve for x
    x = 77,770,939,455.01/438,172.91
  6. Step 6: Final answer
    x = 177,489.16

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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.