Home / 819,116.40-1,228,346.55-286,363.20

Finding the Fourth Proportional to 819,116.40, 1,228,346.55 and 286,363.20

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Solution

The fourth proportional to 819,116.40, 1,228,346.55 and 286,363.20 is: 429,430.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,116.40 : 1,228,346.55 = 286,363.20 : x
  2. Step 2: Convert to fraction form
    819,116.40/1,228,346.55 = 286,363.20/x
  3. Step 3: Cross multiply
    819,116.40x = 1,228,346.55 × 286,363.20
  4. Step 4: Simplify right side
    819,116.40x = 351,753,248,766.96
  5. Step 5: Solve for x
    x = 351,753,248,766.96/819,116.40
  6. Step 6: Final answer
    x = 429,430.11

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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.