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Finding the Fourth Proportional to 315,844.02, 435,854.61 and 172,603.62

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Solution

The fourth proportional to 315,844.02, 435,854.61 and 172,603.62 is: 238,187.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,844.02 : 435,854.61 = 172,603.62 : x
  2. Step 2: Convert to fraction form
    315,844.02/435,854.61 = 172,603.62/x
  3. Step 3: Cross multiply
    315,844.02x = 435,854.61 × 172,603.62
  4. Step 4: Simplify right side
    315,844.02x = 75,230,083,479.69
  5. Step 5: Solve for x
    x = 75,230,083,479.69/315,844.02
  6. Step 6: Final answer
    x = 238,187.46

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.