Home / 438,742.20-656,801.10-261,157.80

Finding the Fourth Proportional to 438,742.20, 656,801.10 and 261,157.80

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Solution

The fourth proportional to 438,742.20, 656,801.10 and 261,157.80 is: 390,955.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,742.20 : 656,801.10 = 261,157.80 : x
  2. Step 2: Convert to fraction form
    438,742.20/656,801.10 = 261,157.80/x
  3. Step 3: Cross multiply
    438,742.20x = 656,801.10 × 261,157.80
  4. Step 4: Simplify right side
    438,742.20x = 171,528,730,313.58
  5. Step 5: Solve for x
    x = 171,528,730,313.58/438,742.20
  6. Step 6: Final answer
    x = 390,955.62

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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.