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Finding the Fourth Proportional to 708,849.70, 978,236.94 and 402,938.92

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Solution

The fourth proportional to 708,849.70, 978,236.94 and 402,938.92 is: 556,069.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,849.70 : 978,236.94 = 402,938.92 : x
  2. Step 2: Convert to fraction form
    708,849.70/978,236.94 = 402,938.92/x
  3. Step 3: Cross multiply
    708,849.70x = 978,236.94 × 402,938.92
  4. Step 4: Simplify right side
    708,849.70x = 394,169,736,107.71
  5. Step 5: Solve for x
    x = 394,169,736,107.71/708,849.70
  6. Step 6: Final answer
    x = 556,069.55

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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.