Home / 1,312,728.40-1,969,092.60-315,456.40

Finding the Fourth Proportional to 1,312,728.40, 1,969,092.60 and 315,456.40

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Solution

The fourth proportional to 1,312,728.40, 1,969,092.60 and 315,456.40 is: 473,184.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,728.40 : 1,969,092.60 = 315,456.40 : x
  2. Step 2: Convert to fraction form
    1,312,728.40/1,969,092.60 = 315,456.40/x
  3. Step 3: Cross multiply
    1,312,728.40x = 1,969,092.60 × 315,456.40
  4. Step 4: Simplify right side
    1,312,728.40x = 621,162,862,862.64
  5. Step 5: Solve for x
    x = 621,162,862,862.64/1,312,728.40
  6. Step 6: Final answer
    x = 473,184.60

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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.