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Finding the Fourth Proportional to 772,728.80, 1,157,710.80 and 662,136.80

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Solution

The fourth proportional to 772,728.80, 1,157,710.80 and 662,136.80 is: 992,020.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    772,728.80 : 1,157,710.80 = 662,136.80 : x
  2. Step 2: Convert to fraction form
    772,728.80/1,157,710.80 = 662,136.80/x
  3. Step 3: Cross multiply
    772,728.80x = 1,157,710.80 × 662,136.80
  4. Step 4: Simplify right side
    772,728.80x = 766,562,924,437.44
  5. Step 5: Solve for x
    x = 766,562,924,437.44/772,728.80
  6. Step 6: Final answer
    x = 992,020.65

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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.