Home / 1,312,691.60-1,969,037.40-315,419.60

Finding the Fourth Proportional to 1,312,691.60, 1,969,037.40 and 315,419.60

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Solution

The fourth proportional to 1,312,691.60, 1,969,037.40 and 315,419.60 is: 473,129.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,312,691.60 : 1,969,037.40 = 315,419.60 : x
  2. Step 2: Convert to fraction form
    1,312,691.60/1,969,037.40 = 315,419.60/x
  3. Step 3: Cross multiply
    1,312,691.60x = 1,969,037.40 × 315,419.60
  4. Step 4: Simplify right side
    1,312,691.60x = 621,072,989,093.04
  5. Step 5: Solve for x
    x = 621,072,989,093.04/1,312,691.60
  6. Step 6: Final answer
    x = 473,129.40

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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.