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Finding the Fourth Proportional to 438,613.40, 657,920.10 and 281,149.40

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Solution

The fourth proportional to 438,613.40, 657,920.10 and 281,149.40 is: 421,724.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,613.40 : 657,920.10 = 281,149.40 : x
  2. Step 2: Convert to fraction form
    438,613.40/657,920.10 = 281,149.40/x
  3. Step 3: Cross multiply
    438,613.40x = 657,920.10 × 281,149.40
  4. Step 4: Simplify right side
    438,613.40x = 184,973,841,362.94
  5. Step 5: Solve for x
    x = 184,973,841,362.94/438,613.40
  6. Step 6: Final answer
    x = 421,724.10

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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.