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Finding the Fourth Proportional to 438,660.80, 657,991.20 and 228,271.40

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Solution

The fourth proportional to 438,660.80, 657,991.20 and 228,271.40 is: 342,407.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,660.80 : 657,991.20 = 228,271.40 : x
  2. Step 2: Convert to fraction form
    438,660.80/657,991.20 = 228,271.40/x
  3. Step 3: Cross multiply
    438,660.80x = 657,991.20 × 228,271.40
  4. Step 4: Simplify right side
    438,660.80x = 150,200,572,411.68
  5. Step 5: Solve for x
    x = 150,200,572,411.68/438,660.80
  6. Step 6: Final answer
    x = 342,407.10

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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.