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Finding the Fourth Proportional to 453,928.90, 680,820.45 and 138,312.40

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Solution

The fourth proportional to 453,928.90, 680,820.45 and 138,312.40 is: 207,446.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,928.90 : 680,820.45 = 138,312.40 : x
  2. Step 2: Convert to fraction form
    453,928.90/680,820.45 = 138,312.40/x
  3. Step 3: Cross multiply
    453,928.90x = 680,820.45 × 138,312.40
  4. Step 4: Simplify right side
    453,928.90x = 94,165,910,408.58
  5. Step 5: Solve for x
    x = 94,165,910,408.58/453,928.90
  6. Step 6: Final answer
    x = 207,446.39

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1.5x scale

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.