Home / 520,853.20-781,352.70-221,331.40

Finding the Fourth Proportional to 520,853.20, 781,352.70 and 221,331.40

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Solution

The fourth proportional to 520,853.20, 781,352.70 and 221,331.40 is: 332,028.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,853.20 : 781,352.70 = 221,331.40 : x
  2. Step 2: Convert to fraction form
    520,853.20/781,352.70 = 221,331.40/x
  3. Step 3: Cross multiply
    520,853.20x = 781,352.70 × 221,331.40
  4. Step 4: Simplify right side
    520,853.20x = 172,937,886,984.78
  5. Step 5: Solve for x
    x = 172,937,886,984.78/520,853.20
  6. Step 6: Final answer
    x = 332,028.08

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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.