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Finding the Fourth Proportional to 666,306.70, 919,499.79 and 360,382.76

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Solution

The fourth proportional to 666,306.70, 919,499.79 and 360,382.76 is: 497,326.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,306.70 : 919,499.79 = 360,382.76 : x
  2. Step 2: Convert to fraction form
    666,306.70/919,499.79 = 360,382.76/x
  3. Step 3: Cross multiply
    666,306.70x = 919,499.79 × 360,382.76
  4. Step 4: Simplify right side
    666,306.70x = 331,371,872,139.62
  5. Step 5: Solve for x
    x = 331,371,872,139.62/666,306.70
  6. Step 6: Final answer
    x = 497,326.34

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1.5x scale

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.