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Finding the Fourth Proportional to 917,070.80, 1,375,606.20 and 806,478.80

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Solution

The fourth proportional to 917,070.80, 1,375,606.20 and 806,478.80 is: 1,209,718.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,070.80 : 1,375,606.20 = 806,478.80 : x
  2. Step 2: Convert to fraction form
    917,070.80/1,375,606.20 = 806,478.80/x
  3. Step 3: Cross multiply
    917,070.80x = 1,375,606.20 × 806,478.80
  4. Step 4: Simplify right side
    917,070.80x = 1,109,397,237,448.56
  5. Step 5: Solve for x
    x = 1,109,397,237,448.56/917,070.80
  6. Step 6: Final answer
    x = 1,209,718.20

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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.