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Finding the Fourth Proportional to 586.15, 808.68 and 387.08

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Solution

The fourth proportional to 586.15, 808.68 and 387.08 is: 534.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.15 : 808.68 = 387.08 : x
  2. Step 2: Convert to fraction form
    586.15/808.68 = 387.08/x
  3. Step 3: Cross multiply
    586.15x = 808.68 × 387.08
  4. Step 4: Simplify right side
    586.15x = 313,020.78
  5. Step 5: Solve for x
    x = 313,020.78/586.15
  6. Step 6: Final answer
    x = 534.03

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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.