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Finding the Fourth Proportional to 871,387.60, 1,307,119.80 and 492,302.80

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Solution

The fourth proportional to 871,387.60, 1,307,119.80 and 492,302.80 is: 738,475.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,387.60 : 1,307,119.80 = 492,302.80 : x
  2. Step 2: Convert to fraction form
    871,387.60/1,307,119.80 = 492,302.80/x
  3. Step 3: Cross multiply
    871,387.60x = 1,307,119.80 × 492,302.80
  4. Step 4: Simplify right side
    871,387.60x = 643,498,737,475.44
  5. Step 5: Solve for x
    x = 643,498,737,475.44/871,387.60
  6. Step 6: Final answer
    x = 738,475.89

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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.