Home / 520,837.20-781,328.70-221,315.40

Finding the Fourth Proportional to 520,837.20, 781,328.70 and 221,315.40

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Solution

The fourth proportional to 520,837.20, 781,328.70 and 221,315.40 is: 332,004.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,837.20 : 781,328.70 = 221,315.40 : x
  2. Step 2: Convert to fraction form
    520,837.20/781,328.70 = 221,315.40/x
  3. Step 3: Cross multiply
    520,837.20x = 781,328.70 × 221,315.40
  4. Step 4: Simplify right side
    520,837.20x = 172,920,073,771.98
  5. Step 5: Solve for x
    x = 172,920,073,771.98/520,837.20
  6. Step 6: Final answer
    x = 332,004.08

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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.