Home / 687,221.04-948,478.81-381,395.65

Finding the Fourth Proportional to 687,221.04, 948,478.81 and 381,395.65

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Solution

The fourth proportional to 687,221.04, 948,478.81 and 381,395.65 is: 526,389.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    687,221.04 : 948,478.81 = 381,395.65 : x
  2. Step 2: Convert to fraction form
    687,221.04/948,478.81 = 381,395.65/x
  3. Step 3: Cross multiply
    687,221.04x = 948,478.81 × 381,395.65
  4. Step 4: Simplify right side
    687,221.04x = 361,745,692,251.18
  5. Step 5: Solve for x
    x = 361,745,692,251.18/687,221.04
  6. Step 6: Final answer
    x = 526,389.14

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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.