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Finding the Fourth Proportional to 661,009.40, 991,514.10 and 162,373.40

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Solution

The fourth proportional to 661,009.40, 991,514.10 and 162,373.40 is: 243,560.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,009.40 : 991,514.10 = 162,373.40 : x
  2. Step 2: Convert to fraction form
    661,009.40/991,514.10 = 162,373.40/x
  3. Step 3: Cross multiply
    661,009.40x = 991,514.10 × 162,373.40
  4. Step 4: Simplify right side
    661,009.40x = 160,995,515,564.94
  5. Step 5: Solve for x
    x = 160,995,515,564.94/661,009.40
  6. Step 6: Final answer
    x = 243,560.10

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Double scale
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Similar ratio
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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.