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Finding the Fourth Proportional to 918,810, 1,267,957.80 and 516,402

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Solution

The fourth proportional to 918,810, 1,267,957.80 and 516,402 is: 712,634.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    918,810 : 1,267,957.80 = 516,402 : x
  2. Step 2: Convert to fraction form
    918,810/1,267,957.80 = 516,402/x
  3. Step 3: Cross multiply
    918,810x = 1,267,957.80 × 516,402
  4. Step 4: Simplify right side
    918,810x = 654,775,943,835.60
  5. Step 5: Solve for x
    x = 654,775,943,835.60/918,810
  6. Step 6: Final answer
    x = 712,634.76

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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.