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Finding the Fourth Proportional to 315,663.14, 435,602.48 and 172,428.28

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Solution

The fourth proportional to 315,663.14, 435,602.48 and 172,428.28 is: 237,944.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,663.14 : 435,602.48 = 172,428.28 : x
  2. Step 2: Convert to fraction form
    315,663.14/435,602.48 = 172,428.28/x
  3. Step 3: Cross multiply
    315,663.14x = 435,602.48 × 172,428.28
  4. Step 4: Simplify right side
    315,663.14x = 75,110,184,438.99
  5. Step 5: Solve for x
    x = 75,110,184,438.99/315,663.14
  6. Step 6: Final answer
    x = 237,944.11

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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.