Home / 658,011.60-987,017.40-421,815.60

Finding the Fourth Proportional to 658,011.60, 987,017.40 and 421,815.60

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Solution

The fourth proportional to 658,011.60, 987,017.40 and 421,815.60 is: 632,723.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,011.60 : 987,017.40 = 421,815.60 : x
  2. Step 2: Convert to fraction form
    658,011.60/987,017.40 = 421,815.60/x
  3. Step 3: Cross multiply
    658,011.60x = 987,017.40 × 421,815.60
  4. Step 4: Simplify right side
    658,011.60x = 416,339,336,791.44
  5. Step 5: Solve for x
    x = 416,339,336,791.44/658,011.60
  6. Step 6: Final answer
    x = 632,723.40

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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.