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Finding the Fourth Proportional to 658,494.80, 987,742.20 and 445,918.40

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Solution

The fourth proportional to 658,494.80, 987,742.20 and 445,918.40 is: 668,877.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,494.80 : 987,742.20 = 445,918.40 : x
  2. Step 2: Convert to fraction form
    658,494.80/987,742.20 = 445,918.40/x
  3. Step 3: Cross multiply
    658,494.80x = 987,742.20 × 445,918.40
  4. Step 4: Simplify right side
    658,494.80x = 440,452,421,436.48
  5. Step 5: Solve for x
    x = 440,452,421,436.48/658,494.80
  6. Step 6: Final answer
    x = 668,877.60

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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.