Home / 810,133.60-1,215,200.40-390,229.60

Finding the Fourth Proportional to 810,133.60, 1,215,200.40 and 390,229.60

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Solution

The fourth proportional to 810,133.60, 1,215,200.40 and 390,229.60 is: 585,344.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    810,133.60 : 1,215,200.40 = 390,229.60 : x
  2. Step 2: Convert to fraction form
    810,133.60/1,215,200.40 = 390,229.60/x
  3. Step 3: Cross multiply
    810,133.60x = 1,215,200.40 × 390,229.60
  4. Step 4: Simplify right side
    810,133.60x = 474,207,166,011.84
  5. Step 5: Solve for x
    x = 474,207,166,011.84/810,133.60
  6. Step 6: Final answer
    x = 585,344.40

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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.