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Finding the Fourth Proportional to 515,060.40, 772,590.60 and 409,306.80

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Solution

The fourth proportional to 515,060.40, 772,590.60 and 409,306.80 is: 613,960.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    515,060.40 : 772,590.60 = 409,306.80 : x
  2. Step 2: Convert to fraction form
    515,060.40/772,590.60 = 409,306.80/x
  3. Step 3: Cross multiply
    515,060.40x = 772,590.60 × 409,306.80
  4. Step 4: Simplify right side
    515,060.40x = 316,226,586,196.08
  5. Step 5: Solve for x
    x = 316,226,586,196.08/515,060.40
  6. Step 6: Final answer
    x = 613,960.20

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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.