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Finding the Fourth Proportional to 658,474.80, 987,712.20 and 492,586.80

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Solution

The fourth proportional to 658,474.80, 987,712.20 and 492,586.80 is: 738,880.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,474.80 : 987,712.20 = 492,586.80 : x
  2. Step 2: Convert to fraction form
    658,474.80/987,712.20 = 492,586.80/x
  3. Step 3: Cross multiply
    658,474.80x = 987,712.20 × 492,586.80
  4. Step 4: Simplify right side
    658,474.80x = 486,533,991,918.96
  5. Step 5: Solve for x
    x = 486,533,991,918.96/658,474.80
  6. Step 6: Final answer
    x = 738,880.20

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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.