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Finding the Fourth Proportional to 453,909.51, 680,966.37 and 138,398.31

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Solution

The fourth proportional to 453,909.51, 680,966.37 and 138,398.31 is: 207,628.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,909.51 : 680,966.37 = 138,398.31 : x
  2. Step 2: Convert to fraction form
    453,909.51/680,966.37 = 138,398.31/x
  3. Step 3: Cross multiply
    453,909.51x = 680,966.37 × 138,398.31
  4. Step 4: Simplify right side
    453,909.51x = 94,244,594,774.83
  5. Step 5: Solve for x
    x = 94,244,594,774.83/453,909.51
  6. Step 6: Final answer
    x = 207,628.60

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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.