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Finding the Fourth Proportional to 1,278,888.72, 1,764,866.52 and 705,929.04

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Solution

The fourth proportional to 1,278,888.72, 1,764,866.52 and 705,929.04 is: 974,182.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,888.72 : 1,764,866.52 = 705,929.04 : x
  2. Step 2: Convert to fraction form
    1,278,888.72/1,764,866.52 = 705,929.04/x
  3. Step 3: Cross multiply
    1,278,888.72x = 1,764,866.52 × 705,929.04
  4. Step 4: Simplify right side
    1,278,888.72x = 1,245,870,528,191.74
  5. Step 5: Solve for x
    x = 1,245,870,528,191.74/1,278,888.72
  6. Step 6: Final answer
    x = 974,182.12

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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.