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Finding the Fourth Proportional to 672,956.19, 928,780.29 and 431,511.39

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Solution

The fourth proportional to 672,956.19, 928,780.29 and 431,511.39 is: 595,550.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    672,956.19 : 928,780.29 = 431,511.39 : x
  2. Step 2: Convert to fraction form
    672,956.19/928,780.29 = 431,511.39/x
  3. Step 3: Cross multiply
    672,956.19x = 928,780.29 × 431,511.39
  4. Step 4: Simplify right side
    672,956.19x = 400,779,273,942.50
  5. Step 5: Solve for x
    x = 400,779,273,942.50/672,956.19
  6. Step 6: Final answer
    x = 595,550.32

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.