Home / 691,247.40-1,036,871.10-407,812.20

Finding the Fourth Proportional to 691,247.40, 1,036,871.10 and 407,812.20

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Solution

The fourth proportional to 691,247.40, 1,036,871.10 and 407,812.20 is: 611,718.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,247.40 : 1,036,871.10 = 407,812.20 : x
  2. Step 2: Convert to fraction form
    691,247.40/1,036,871.10 = 407,812.20/x
  3. Step 3: Cross multiply
    691,247.40x = 1,036,871.10 × 407,812.20
  4. Step 4: Simplify right side
    691,247.40x = 422,848,684,407.42
  5. Step 5: Solve for x
    x = 422,848,684,407.42/691,247.40
  6. Step 6: Final answer
    x = 611,718.30

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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.