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Finding the Fourth Proportional to 521,510.40, 781,358.40 and 240,451.20

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Solution

The fourth proportional to 521,510.40, 781,358.40 and 240,451.20 is: 360,258.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    521,510.40 : 781,358.40 = 240,451.20 : x
  2. Step 2: Convert to fraction form
    521,510.40/781,358.40 = 240,451.20/x
  3. Step 3: Cross multiply
    521,510.40x = 781,358.40 × 240,451.20
  4. Step 4: Simplify right side
    521,510.40x = 187,878,564,910.08
  5. Step 5: Solve for x
    x = 187,878,564,910.08/521,510.40
  6. Step 6: Final answer
    x = 360,258.52

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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.