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Finding the Fourth Proportional to 708,882.64, 978,016.20 and 402,928.08

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Solution

The fourth proportional to 708,882.64, 978,016.20 and 402,928.08 is: 555,903.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,882.64 : 978,016.20 = 402,928.08 : x
  2. Step 2: Convert to fraction form
    708,882.64/978,016.20 = 402,928.08/x
  3. Step 3: Cross multiply
    708,882.64x = 978,016.20 × 402,928.08
  4. Step 4: Simplify right side
    708,882.64x = 394,070,189,674.90
  5. Step 5: Solve for x
    x = 394,070,189,674.90/708,882.64
  6. Step 6: Final answer
    x = 555,903.29

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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.