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Finding the Fourth Proportional to 310,981.76, 429,157.88 and 173,162.62

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Solution

The fourth proportional to 310,981.76, 429,157.88 and 173,162.62 is: 238,966.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    310,981.76 : 429,157.88 = 173,162.62 : x
  2. Step 2: Convert to fraction form
    310,981.76/429,157.88 = 173,162.62/x
  3. Step 3: Cross multiply
    310,981.76x = 429,157.88 × 173,162.62
  4. Step 4: Simplify right side
    310,981.76x = 74,314,102,894.45
  5. Step 5: Solve for x
    x = 74,314,102,894.45/310,981.76
  6. Step 6: Final answer
    x = 238,966.11

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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.