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Finding the Fourth Proportional to 708,886.62, 978,234.03 and 386,590.86

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Solution

The fourth proportional to 708,886.62, 978,234.03 and 386,590.86 is: 533,479.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    708,886.62 : 978,234.03 = 386,590.86 : x
  2. Step 2: Convert to fraction form
    708,886.62/978,234.03 = 386,590.86/x
  3. Step 3: Cross multiply
    708,886.62x = 978,234.03 × 386,590.86
  4. Step 4: Simplify right side
    708,886.62x = 378,176,334,938.97
  5. Step 5: Solve for x
    x = 378,176,334,938.97/708,886.62
  6. Step 6: Final answer
    x = 533,479.30

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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.