Home / 856,543.40-1,284,815.10-458,412.20

Finding the Fourth Proportional to 856,543.40, 1,284,815.10 and 458,412.20

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Solution

The fourth proportional to 856,543.40, 1,284,815.10 and 458,412.20 is: 687,618.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,543.40 : 1,284,815.10 = 458,412.20 : x
  2. Step 2: Convert to fraction form
    856,543.40/1,284,815.10 = 458,412.20/x
  3. Step 3: Cross multiply
    856,543.40x = 1,284,815.10 × 458,412.20
  4. Step 4: Simplify right side
    856,543.40x = 588,974,916,584.22
  5. Step 5: Solve for x
    x = 588,974,916,584.22/856,543.40
  6. Step 6: Final answer
    x = 687,618.30

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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.