Home / 856,403.40-1,284,605.10-458,272.20

Finding the Fourth Proportional to 856,403.40, 1,284,605.10 and 458,272.20

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Solution

The fourth proportional to 856,403.40, 1,284,605.10 and 458,272.20 is: 687,408.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    856,403.40 : 1,284,605.10 = 458,272.20 : x
  2. Step 2: Convert to fraction form
    856,403.40/1,284,605.10 = 458,272.20/x
  3. Step 3: Cross multiply
    856,403.40x = 1,284,605.10 × 458,272.20
  4. Step 4: Simplify right side
    856,403.40x = 588,698,805,308.22
  5. Step 5: Solve for x
    x = 588,698,805,308.22/856,403.40
  6. Step 6: Final answer
    x = 687,408.30

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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.