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Finding the Fourth Proportional to 438,742.80, 658,114.20 and 228,353.40

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Solution

The fourth proportional to 438,742.80, 658,114.20 and 228,353.40 is: 342,530.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,742.80 : 658,114.20 = 228,353.40 : x
  2. Step 2: Convert to fraction form
    438,742.80/658,114.20 = 228,353.40/x
  3. Step 3: Cross multiply
    438,742.80x = 658,114.20 × 228,353.40
  4. Step 4: Simplify right side
    438,742.80x = 150,282,615,158.28
  5. Step 5: Solve for x
    x = 150,282,615,158.28/438,742.80
  6. Step 6: Final answer
    x = 342,530.10

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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.