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Finding the Fourth Proportional to 438,445.80, 657,668.70 and 122,956.20

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Solution

The fourth proportional to 438,445.80, 657,668.70 and 122,956.20 is: 184,434.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    438,445.80 : 657,668.70 = 122,956.20 : x
  2. Step 2: Convert to fraction form
    438,445.80/657,668.70 = 122,956.20/x
  3. Step 3: Cross multiply
    438,445.80x = 657,668.70 × 122,956.20
  4. Step 4: Simplify right side
    438,445.80x = 80,864,444,210.94
  5. Step 5: Solve for x
    x = 80,864,444,210.94/438,445.80
  6. Step 6: Final answer
    x = 184,434.30

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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.