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Finding the Fourth Proportional to 708,756.12, 978,046.38 and 402,791.58

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Solution

The fourth proportional to 708,756.12, 978,046.38 and 402,791.58 is: 555,831.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,756.12 : 978,046.38 = 402,791.58 : x
  2. Step 2: Convert to fraction form
    708,756.12/978,046.38 = 402,791.58/x
  3. Step 3: Cross multiply
    708,756.12x = 978,046.38 × 402,791.58
  4. Step 4: Simplify right side
    708,756.12x = 393,948,846,713.48
  5. Step 5: Solve for x
    x = 393,948,846,713.48/708,756.12
  6. Step 6: Final answer
    x = 555,831.32

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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.