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Finding the Fourth Proportional to 364,578.40, 547,904.40 and 318,959.20

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Solution

The fourth proportional to 364,578.40, 547,904.40 and 318,959.20 is: 479,345.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    364,578.40 : 547,904.40 = 318,959.20 : x
  2. Step 2: Convert to fraction form
    364,578.40/547,904.40 = 318,959.20/x
  3. Step 3: Cross multiply
    364,578.40x = 547,904.40 × 318,959.20
  4. Step 4: Simplify right side
    364,578.40x = 174,759,149,100.48
  5. Step 5: Solve for x
    x = 174,759,149,100.48/364,578.40
  6. Step 6: Final answer
    x = 479,345.87

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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.