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Finding the Fourth Proportional to 708,751.62, 978,040.17 and 402,787.08

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Solution

The fourth proportional to 708,751.62, 978,040.17 and 402,787.08 is: 555,825.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,751.62 : 978,040.17 = 402,787.08 : x
  2. Step 2: Convert to fraction form
    708,751.62/978,040.17 = 402,787.08/x
  3. Step 3: Cross multiply
    708,751.62x = 978,040.17 × 402,787.08
  4. Step 4: Simplify right side
    708,751.62x = 393,941,944,197.00
  5. Step 5: Solve for x
    x = 393,941,944,197.00/708,751.62
  6. Step 6: Final answer
    x = 555,825.11

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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.