Home / 438,420.80-657,631.20-225,844.40

Finding the Fourth Proportional to 438,420.80, 657,631.20 and 225,844.40

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Solution

The fourth proportional to 438,420.80, 657,631.20 and 225,844.40 is: 338,766.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,420.80 : 657,631.20 = 225,844.40 : x
  2. Step 2: Convert to fraction form
    438,420.80/657,631.20 = 225,844.40/x
  3. Step 3: Cross multiply
    438,420.80x = 657,631.20 × 225,844.40
  4. Step 4: Simplify right side
    438,420.80x = 148,522,323,785.28
  5. Step 5: Solve for x
    x = 148,522,323,785.28/438,420.80
  6. Step 6: Final answer
    x = 338,766.60

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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.