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Finding the Fourth Proportional to 487,693.80, 731,540.70 and 353,946.60

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Solution

The fourth proportional to 487,693.80, 731,540.70 and 353,946.60 is: 530,919.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,693.80 : 731,540.70 = 353,946.60 : x
  2. Step 2: Convert to fraction form
    487,693.80/731,540.70 = 353,946.60/x
  3. Step 3: Cross multiply
    487,693.80x = 731,540.70 × 353,946.60
  4. Step 4: Simplify right side
    487,693.80x = 258,926,343,526.62
  5. Step 5: Solve for x
    x = 258,926,343,526.62/487,693.80
  6. Step 6: Final answer
    x = 530,919.90

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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.