Home / 871,679.40-1,307,519.10-310,511.40

Finding the Fourth Proportional to 871,679.40, 1,307,519.10 and 310,511.40

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Solution

The fourth proportional to 871,679.40, 1,307,519.10 and 310,511.40 is: 465,767.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,679.40 : 1,307,519.10 = 310,511.40 : x
  2. Step 2: Convert to fraction form
    871,679.40/1,307,519.10 = 310,511.40/x
  3. Step 3: Cross multiply
    871,679.40x = 1,307,519.10 × 310,511.40
  4. Step 4: Simplify right side
    871,679.40x = 405,999,586,267.74
  5. Step 5: Solve for x
    x = 405,999,586,267.74/871,679.40
  6. Step 6: Final answer
    x = 465,767.10

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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.