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Finding the Fourth Proportional to 438,256.66, 657,483.54 and 138,755.20

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Solution

The fourth proportional to 438,256.66, 657,483.54 and 138,755.20 is: 208,164.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,256.66 : 657,483.54 = 138,755.20 : x
  2. Step 2: Convert to fraction form
    438,256.66/657,483.54 = 138,755.20/x
  3. Step 3: Cross multiply
    438,256.66x = 657,483.54 × 138,755.20
  4. Step 4: Simplify right side
    438,256.66x = 91,229,260,089.41
  5. Step 5: Solve for x
    x = 91,229,260,089.41/438,256.66
  6. Step 6: Final answer
    x = 208,164.00

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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.