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Finding the Fourth Proportional to 666,357, 999,534.71 and 217,077.15

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Solution

The fourth proportional to 666,357, 999,534.71 and 217,077.15 is: 325,615.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,357 : 999,534.71 = 217,077.15 : x
  2. Step 2: Convert to fraction form
    666,357/999,534.71 = 217,077.15/x
  3. Step 3: Cross multiply
    666,357x = 999,534.71 × 217,077.15
  4. Step 4: Simplify right side
    666,357x = 216,976,145,087.49
  5. Step 5: Solve for x
    x = 216,976,145,087.49/666,357
  6. Step 6: Final answer
    x = 325,615.47

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.