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Finding the Fourth Proportional to 315,322.88, 435,154.79 and 172,092.11

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Solution

The fourth proportional to 315,322.88, 435,154.79 and 172,092.11 is: 237,492.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,322.88 : 435,154.79 = 172,092.11 : x
  2. Step 2: Convert to fraction form
    315,322.88/435,154.79 = 172,092.11/x
  3. Step 3: Cross multiply
    315,322.88x = 435,154.79 × 172,092.11
  4. Step 4: Simplify right side
    315,322.88x = 74,886,704,242.16
  5. Step 5: Solve for x
    x = 74,886,704,242.16/315,322.88
  6. Step 6: Final answer
    x = 237,492.14

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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.