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Finding the Fourth Proportional to 708,912.20, 978,259.92 and 402,946.04

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Solution

The fourth proportional to 708,912.20, 978,259.92 and 402,946.04 is: 556,043.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,912.20 : 978,259.92 = 402,946.04 : x
  2. Step 2: Convert to fraction form
    708,912.20/978,259.92 = 402,946.04/x
  3. Step 3: Cross multiply
    708,912.20x = 978,259.92 × 402,946.04
  4. Step 4: Simplify right side
    708,912.20x = 394,185,960,854.72
  5. Step 5: Solve for x
    x = 394,185,960,854.72/708,912.20
  6. Step 6: Final answer
    x = 556,043.42

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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.