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Finding the Fourth Proportional to 402,737.28, 555,783.96 and 221,457.12

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Solution

The fourth proportional to 402,737.28, 555,783.96 and 221,457.12 is: 305,614.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,737.28 : 555,783.96 = 221,457.12 : x
  2. Step 2: Convert to fraction form
    402,737.28/555,783.96 = 221,457.12/x
  3. Step 3: Cross multiply
    402,737.28x = 555,783.96 × 221,457.12
  4. Step 4: Simplify right side
    402,737.28x = 123,082,315,123.80
  5. Step 5: Solve for x
    x = 123,082,315,123.80/402,737.28
  6. Step 6: Final answer
    x = 305,614.41

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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.