Home / 810,005.70-1,215,008.55-491,141.10

Finding the Fourth Proportional to 810,005.70, 1,215,008.55 and 491,141.10

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Solution

The fourth proportional to 810,005.70, 1,215,008.55 and 491,141.10 is: 736,711.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,005.70 : 1,215,008.55 = 491,141.10 : x
  2. Step 2: Convert to fraction form
    810,005.70/1,215,008.55 = 491,141.10/x
  3. Step 3: Cross multiply
    810,005.70x = 1,215,008.55 × 491,141.10
  4. Step 4: Simplify right side
    810,005.70x = 596,740,635,756.41
  5. Step 5: Solve for x
    x = 596,740,635,756.41/810,005.70
  6. Step 6: Final answer
    x = 736,711.65

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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.