Home / 687,320.76-948,508.02-381,398.34

Finding the Fourth Proportional to 687,320.76, 948,508.02 and 381,398.34

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Solution

The fourth proportional to 687,320.76, 948,508.02 and 381,398.34 is: 526,332.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,320.76 : 948,508.02 = 381,398.34 : x
  2. Step 2: Convert to fraction form
    687,320.76/948,508.02 = 381,398.34/x
  3. Step 3: Cross multiply
    687,320.76x = 948,508.02 × 381,398.34
  4. Step 4: Simplify right side
    687,320.76x = 361,759,384,304.69
  5. Step 5: Solve for x
    x = 361,759,384,304.69/687,320.76
  6. Step 6: Final answer
    x = 526,332.69

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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.