Home / 1,187,011.20-1,780,516.80-438,902.40

Finding the Fourth Proportional to 1,187,011.20, 1,780,516.80 and 438,902.40

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Solution

The fourth proportional to 1,187,011.20, 1,780,516.80 and 438,902.40 is: 658,353.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,011.20 : 1,780,516.80 = 438,902.40 : x
  2. Step 2: Convert to fraction form
    1,187,011.20/1,780,516.80 = 438,902.40/x
  3. Step 3: Cross multiply
    1,187,011.20x = 1,780,516.80 × 438,902.40
  4. Step 4: Simplify right side
    1,187,011.20x = 781,473,096,760.32
  5. Step 5: Solve for x
    x = 781,473,096,760.32/1,187,011.20
  6. Step 6: Final answer
    x = 658,353.60

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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.