Home / 438,108.48-657,227.20-138,521.28

Finding the Fourth Proportional to 438,108.48, 657,227.20 and 138,521.28

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Solution

The fourth proportional to 438,108.48, 657,227.20 and 138,521.28 is: 207,802.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,108.48 : 657,227.20 = 138,521.28 : x
  2. Step 2: Convert to fraction form
    438,108.48/657,227.20 = 138,521.28/x
  3. Step 3: Cross multiply
    438,108.48x = 657,227.20 × 138,521.28
  4. Step 4: Simplify right side
    438,108.48x = 91,039,952,994.82
  5. Step 5: Solve for x
    x = 91,039,952,994.82/438,108.48
  6. Step 6: Final answer
    x = 207,802.31

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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.