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Finding the Fourth Proportional to 716,009.12, 987,846.66 and 443,979.12

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Solution

The fourth proportional to 716,009.12, 987,846.66 and 443,979.12 is: 612,538.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,009.12 : 987,846.66 = 443,979.12 : x
  2. Step 2: Convert to fraction form
    716,009.12/987,846.66 = 443,979.12/x
  3. Step 3: Cross multiply
    716,009.12x = 987,846.66 × 443,979.12
  4. Step 4: Simplify right side
    716,009.12x = 438,583,290,801.74
  5. Step 5: Solve for x
    x = 438,583,290,801.74/716,009.12
  6. Step 6: Final answer
    x = 612,538.70

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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.