Home / 687,345.20-948,511.46-381,434.94

Finding the Fourth Proportional to 687,345.20, 948,511.46 and 381,434.94

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Solution

The fourth proportional to 687,345.20, 948,511.46 and 381,434.94 is: 526,366.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,345.20 : 948,511.46 = 381,434.94 : x
  2. Step 2: Convert to fraction form
    687,345.20/948,511.46 = 381,434.94/x
  3. Step 3: Cross multiply
    687,345.20x = 948,511.46 × 381,434.94
  4. Step 4: Simplify right side
    687,345.20x = 361,795,411,834.41
  5. Step 5: Solve for x
    x = 361,795,411,834.41/687,345.20
  6. Step 6: Final answer
    x = 526,366.39

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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.