Home / 871,386.30-1,307,079.45-310,439.10

Finding the Fourth Proportional to 871,386.30, 1,307,079.45 and 310,439.10

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Solution

The fourth proportional to 871,386.30, 1,307,079.45 and 310,439.10 is: 465,658.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,386.30 : 1,307,079.45 = 310,439.10 : x
  2. Step 2: Convert to fraction form
    871,386.30/1,307,079.45 = 310,439.10/x
  3. Step 3: Cross multiply
    871,386.30x = 1,307,079.45 × 310,439.10
  4. Step 4: Simplify right side
    871,386.30x = 405,768,568,086.50
  5. Step 5: Solve for x
    x = 405,768,568,086.50/871,386.30
  6. Step 6: Final answer
    x = 465,658.65

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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.