Home / 1,312,784.20-1,969,176.30-315,512.20

Finding the Fourth Proportional to 1,312,784.20, 1,969,176.30 and 315,512.20

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Solution

The fourth proportional to 1,312,784.20, 1,969,176.30 and 315,512.20 is: 473,268.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,784.20 : 1,969,176.30 = 315,512.20 : x
  2. Step 2: Convert to fraction form
    1,312,784.20/1,969,176.30 = 315,512.20/x
  3. Step 3: Cross multiply
    1,312,784.20x = 1,969,176.30 × 315,512.20
  4. Step 4: Simplify right side
    1,312,784.20x = 621,299,146,600.86
  5. Step 5: Solve for x
    x = 621,299,146,600.86/1,312,784.20
  6. Step 6: Final answer
    x = 473,268.30

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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.