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Finding the Fourth Proportional to 666,534.96, 918,983.88 and 556,311.84

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Solution

The fourth proportional to 666,534.96, 918,983.88 and 556,311.84 is: 767,013.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,534.96 : 918,983.88 = 556,311.84 : x
  2. Step 2: Convert to fraction form
    666,534.96/918,983.88 = 556,311.84/x
  3. Step 3: Cross multiply
    666,534.96x = 918,983.88 × 556,311.84
  4. Step 4: Simplify right side
    666,534.96x = 511,241,613,213.14
  5. Step 5: Solve for x
    x = 511,241,613,213.14/666,534.96
  6. Step 6: Final answer
    x = 767,013.95

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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.