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Finding the Fourth Proportional to 708,908.17, 978,351.51 and 403,080.52

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Solution

The fourth proportional to 708,908.17, 978,351.51 and 403,080.52 is: 556,284.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,908.17 : 978,351.51 = 403,080.52 : x
  2. Step 2: Convert to fraction form
    708,908.17/978,351.51 = 403,080.52/x
  3. Step 3: Cross multiply
    708,908.17x = 978,351.51 × 403,080.52
  4. Step 4: Simplify right side
    708,908.17x = 394,354,435,393.59
  5. Step 5: Solve for x
    x = 394,354,435,393.59/708,908.17
  6. Step 6: Final answer
    x = 556,284.23

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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.