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Finding the Fourth Proportional to 438,743.80, 658,115.70 and 228,354.40

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Solution

The fourth proportional to 438,743.80, 658,115.70 and 228,354.40 is: 342,531.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,743.80 : 658,115.70 = 228,354.40 : x
  2. Step 2: Convert to fraction form
    438,743.80/658,115.70 = 228,354.40/x
  3. Step 3: Cross multiply
    438,743.80x = 658,115.70 × 228,354.40
  4. Step 4: Simplify right side
    438,743.80x = 150,283,615,804.08
  5. Step 5: Solve for x
    x = 150,283,615,804.08/438,743.80
  6. Step 6: Final answer
    x = 342,531.60

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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.