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Finding the Fourth Proportional to 870,888.16, 1,306,734 and 397,718.56

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Solution

The fourth proportional to 870,888.16, 1,306,734 and 397,718.56 is: 596,761.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    870,888.16 : 1,306,734 = 397,718.56 : x
  2. Step 2: Convert to fraction form
    870,888.16/1,306,734 = 397,718.56/x
  3. Step 3: Cross multiply
    870,888.16x = 1,306,734 × 397,718.56
  4. Step 4: Simplify right side
    870,888.16x = 519,712,364,783.04
  5. Step 5: Solve for x
    x = 519,712,364,783.04/870,888.16
  6. Step 6: Final answer
    x = 596,761.32

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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.