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Finding the Fourth Proportional to 461,302.40, 691,888.80 and 145,791.20

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Solution

The fourth proportional to 461,302.40, 691,888.80 and 145,791.20 is: 218,666.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    461,302.40 : 691,888.80 = 145,791.20 : x
  2. Step 2: Convert to fraction form
    461,302.40/691,888.80 = 145,791.20/x
  3. Step 3: Cross multiply
    461,302.40x = 691,888.80 × 145,791.20
  4. Step 4: Simplify right side
    461,302.40x = 100,871,298,418.56
  5. Step 5: Solve for x
    x = 100,871,298,418.56/461,302.40
  6. Step 6: Final answer
    x = 218,666.32

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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.