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Finding the Fourth Proportional to 403,959.36, 601,170.64 and 390,505.02

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Solution

The fourth proportional to 403,959.36, 601,170.64 and 390,505.02 is: 581,147.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,959.36 : 601,170.64 = 390,505.02 : x
  2. Step 2: Convert to fraction form
    403,959.36/601,170.64 = 390,505.02/x
  3. Step 3: Cross multiply
    403,959.36x = 601,170.64 × 390,505.02
  4. Step 4: Simplify right side
    403,959.36x = 234,760,152,796.61
  5. Step 5: Solve for x
    x = 234,760,152,796.61/403,959.36
  6. Step 6: Final answer
    x = 581,147.95

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Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.