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Finding the Fourth Proportional to 918,012, 1,266,975.36 and 515,604

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Solution

The fourth proportional to 918,012, 1,266,975.36 and 515,604 is: 711,600.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,012 : 1,266,975.36 = 515,604 : x
  2. Step 2: Convert to fraction form
    918,012/1,266,975.36 = 515,604/x
  3. Step 3: Cross multiply
    918,012x = 1,266,975.36 × 515,604
  4. Step 4: Simplify right side
    918,012x = 653,257,563,517.44
  5. Step 5: Solve for x
    x = 653,257,563,517.44/918,012
  6. Step 6: Final answer
    x = 711,600.24

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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.