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Finding the Fourth Proportional to 989,888.67, 1,365,340.69 and 908,479.34

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Solution

The fourth proportional to 989,888.67, 1,365,340.69 and 908,479.34 is: 1,253,053.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    989,888.67 : 1,365,340.69 = 908,479.34 : x
  2. Step 2: Convert to fraction form
    989,888.67/1,365,340.69 = 908,479.34/x
  3. Step 3: Cross multiply
    989,888.67x = 1,365,340.69 × 908,479.34
  4. Step 4: Simplify right side
    989,888.67x = 1,240,383,808,926.34
  5. Step 5: Solve for x
    x = 1,240,383,808,926.34/989,888.67
  6. Step 6: Final answer
    x = 1,253,053.85

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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.