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Finding the Fourth Proportional to 315,899.03, 435,925.61 and 172,659.18

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Solution

The fourth proportional to 315,899.03, 435,925.61 and 172,659.18 is: 238,261.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,899.03 : 435,925.61 = 172,659.18 : x
  2. Step 2: Convert to fraction form
    315,899.03/435,925.61 = 172,659.18/x
  3. Step 3: Cross multiply
    315,899.03x = 435,925.61 × 172,659.18
  4. Step 4: Simplify right side
    315,899.03x = 75,266,558,363.60
  5. Step 5: Solve for x
    x = 75,266,558,363.60/315,899.03
  6. Step 6: Final answer
    x = 238,261.44

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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.