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Finding the Fourth Proportional to 317,220.52, 475,955.31 and 139,602.93

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Solution

The fourth proportional to 317,220.52, 475,955.31 and 139,602.93 is: 209,459.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    317,220.52 : 475,955.31 = 139,602.93 : x
  2. Step 2: Convert to fraction form
    317,220.52/475,955.31 = 139,602.93/x
  3. Step 3: Cross multiply
    317,220.52x = 475,955.31 × 139,602.93
  4. Step 4: Simplify right side
    317,220.52x = 66,444,755,825.06
  5. Step 5: Solve for x
    x = 66,444,755,825.06/317,220.52
  6. Step 6: Final answer
    x = 209,459.20

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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.