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Finding the Fourth Proportional to 315,357.64, 435,190.14 and 172,116.52

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Solution

The fourth proportional to 315,357.64, 435,190.14 and 172,116.52 is: 237,518.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,357.64 : 435,190.14 = 172,116.52 : x
  2. Step 2: Convert to fraction form
    315,357.64/435,190.14 = 172,116.52/x
  3. Step 3: Cross multiply
    315,357.64x = 435,190.14 × 172,116.52
  4. Step 4: Simplify right side
    315,357.64x = 74,903,412,435.11
  5. Step 5: Solve for x
    x = 74,903,412,435.11/315,357.64
  6. Step 6: Final answer
    x = 237,518.94

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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.