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Finding the Fourth Proportional to 917,999.80, 1,376,999.70 and 708,047.80

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Solution

The fourth proportional to 917,999.80, 1,376,999.70 and 708,047.80 is: 1,062,071.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,999.80 : 1,376,999.70 = 708,047.80 : x
  2. Step 2: Convert to fraction form
    917,999.80/1,376,999.70 = 708,047.80/x
  3. Step 3: Cross multiply
    917,999.80x = 1,376,999.70 × 708,047.80
  4. Step 4: Simplify right side
    917,999.80x = 974,981,608,185.66
  5. Step 5: Solve for x
    x = 974,981,608,185.66/917,999.80
  6. Step 6: Final answer
    x = 1,062,071.70

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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.