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Finding the Fourth Proportional to 315,954.64, 436,017.36 and 172,715.28

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Solution

The fourth proportional to 315,954.64, 436,017.36 and 172,715.28 is: 238,347.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,954.64 : 436,017.36 = 172,715.28 : x
  2. Step 2: Convert to fraction form
    315,954.64/436,017.36 = 172,715.28/x
  3. Step 3: Cross multiply
    315,954.64x = 436,017.36 × 172,715.28
  4. Step 4: Simplify right side
    315,954.64x = 75,306,860,417.26
  5. Step 5: Solve for x
    x = 75,306,860,417.26/315,954.64
  6. Step 6: Final answer
    x = 238,347.06

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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.