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Finding the Fourth Proportional to 666,305.70, 919,498.41 and 360,381.76

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Solution

The fourth proportional to 666,305.70, 919,498.41 and 360,381.76 is: 497,324.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,305.70 : 919,498.41 = 360,381.76 : x
  2. Step 2: Convert to fraction form
    666,305.70/919,498.41 = 360,381.76/x
  3. Step 3: Cross multiply
    666,305.70x = 919,498.41 × 360,381.76
  4. Step 4: Simplify right side
    666,305.70x = 331,370,452,000.68
  5. Step 5: Solve for x
    x = 331,370,452,000.68/666,305.70
  6. Step 6: Final answer
    x = 497,324.96

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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.