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Finding the Fourth Proportional to 708,798.63, 978,106.60 and 402,834.59

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Solution

The fourth proportional to 708,798.63, 978,106.60 and 402,834.59 is: 555,891.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,798.63 : 978,106.60 = 402,834.59 : x
  2. Step 2: Convert to fraction form
    708,798.63/978,106.60 = 402,834.59/x
  3. Step 3: Cross multiply
    708,798.63x = 978,106.60 × 402,834.59
  4. Step 4: Simplify right side
    708,798.63x = 394,015,171,187.29
  5. Step 5: Solve for x
    x = 394,015,171,187.29/708,798.63
  6. Step 6: Final answer
    x = 555,891.55

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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.