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Finding the Fourth Proportional to 871,392.40, 1,307,169.16 and 338,953.84

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Solution

The fourth proportional to 871,392.40, 1,307,169.16 and 338,953.84 is: 508,462.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    871,392.40 : 1,307,169.16 = 338,953.84 : x
  2. Step 2: Convert to fraction form
    871,392.40/1,307,169.16 = 338,953.84/x
  3. Step 3: Cross multiply
    871,392.40x = 1,307,169.16 × 338,953.84
  4. Step 4: Simplify right side
    871,392.40x = 443,070,006,311.57
  5. Step 5: Solve for x
    x = 443,070,006,311.57/871,392.40
  6. Step 6: Final answer
    x = 508,462.10

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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.