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Finding the Fourth Proportional to 278,696.70, 418,045.05 and 260,034.30

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Solution

The fourth proportional to 278,696.70, 418,045.05 and 260,034.30 is: 390,051.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    278,696.70 : 418,045.05 = 260,034.30 : x
  2. Step 2: Convert to fraction form
    278,696.70/418,045.05 = 260,034.30/x
  3. Step 3: Cross multiply
    278,696.70x = 418,045.05 × 260,034.30
  4. Step 4: Simplify right side
    278,696.70x = 108,706,051,945.22
  5. Step 5: Solve for x
    x = 108,706,051,945.22/278,696.70
  6. Step 6: Final answer
    x = 390,051.45

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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.