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Finding the Fourth Proportional to 666,974.66, 920,423.13 and 365,166.50

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Solution

The fourth proportional to 666,974.66, 920,423.13 and 365,166.50 is: 503,928.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,974.66 : 920,423.13 = 365,166.50 : x
  2. Step 2: Convert to fraction form
    666,974.66/920,423.13 = 365,166.50/x
  3. Step 3: Cross multiply
    666,974.66x = 920,423.13 × 365,166.50
  4. Step 4: Simplify right side
    666,974.66x = 336,107,692,901.15
  5. Step 5: Solve for x
    x = 336,107,692,901.15/666,974.66
  6. Step 6: Final answer
    x = 503,928.73

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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.