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Finding the Fourth Proportional to 708,889.84, 978,286.48 and 386,613.52

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Solution

The fourth proportional to 708,889.84, 978,286.48 and 386,613.52 is: 533,536.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,889.84 : 978,286.48 = 386,613.52 : x
  2. Step 2: Convert to fraction form
    708,889.84/978,286.48 = 386,613.52/x
  3. Step 3: Cross multiply
    708,889.84x = 978,286.48 × 386,613.52
  4. Step 4: Simplify right side
    708,889.84x = 378,218,779,601.21
  5. Step 5: Solve for x
    x = 378,218,779,601.21/708,889.84
  6. Step 6: Final answer
    x = 533,536.75

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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.