Home / 891,145.80-1,336,718.70-513,232.20

Finding the Fourth Proportional to 891,145.80, 1,336,718.70 and 513,232.20

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Solution

The fourth proportional to 891,145.80, 1,336,718.70 and 513,232.20 is: 769,848.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    891,145.80 : 1,336,718.70 = 513,232.20 : x
  2. Step 2: Convert to fraction form
    891,145.80/1,336,718.70 = 513,232.20/x
  3. Step 3: Cross multiply
    891,145.80x = 1,336,718.70 × 513,232.20
  4. Step 4: Simplify right side
    891,145.80x = 686,047,079,182.14
  5. Step 5: Solve for x
    x = 686,047,079,182.14/891,145.80
  6. Step 6: Final answer
    x = 769,848.30

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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.