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Finding the Fourth Proportional to 438,660.80, 657,116.40 and 228,417.20

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Solution

The fourth proportional to 438,660.80, 657,116.40 and 228,417.20 is: 342,170.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,660.80 : 657,116.40 = 228,417.20 : x
  2. Step 2: Convert to fraction form
    438,660.80/657,116.40 = 228,417.20/x
  3. Step 3: Cross multiply
    438,660.80x = 657,116.40 × 228,417.20
  4. Step 4: Simplify right side
    438,660.80x = 150,096,688,162.08
  5. Step 5: Solve for x
    x = 150,096,688,162.08/438,660.80
  6. Step 6: Final answer
    x = 342,170.28

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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.