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Finding the Fourth Proportional to 585,945.40, 878,918.10 and 142,713.40

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Solution

The fourth proportional to 585,945.40, 878,918.10 and 142,713.40 is: 214,070.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    585,945.40 : 878,918.10 = 142,713.40 : x
  2. Step 2: Convert to fraction form
    585,945.40/878,918.10 = 142,713.40/x
  3. Step 3: Cross multiply
    585,945.40x = 878,918.10 × 142,713.40
  4. Step 4: Simplify right side
    585,945.40x = 125,433,390,372.54
  5. Step 5: Solve for x
    x = 125,433,390,372.54/585,945.40
  6. Step 6: Final answer
    x = 214,070.10

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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.