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Finding the Fourth Proportional to 580,851.40, 871,302.70 and 328,128.20

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Solution

The fourth proportional to 580,851.40, 871,302.70 and 328,128.20 is: 492,206.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    580,851.40 : 871,302.70 = 328,128.20 : x
  2. Step 2: Convert to fraction form
    580,851.40/871,302.70 = 328,128.20/x
  3. Step 3: Cross multiply
    580,851.40x = 871,302.70 × 328,128.20
  4. Step 4: Simplify right side
    580,851.40x = 285,898,986,606.14
  5. Step 5: Solve for x
    x = 285,898,986,606.14/580,851.40
  6. Step 6: Final answer
    x = 492,206.76

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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.