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Finding the Fourth Proportional to 586.13, 808.57 and 389.39

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Solution

The fourth proportional to 586.13, 808.57 and 389.39 is: 537.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.13 : 808.57 = 389.39 : x
  2. Step 2: Convert to fraction form
    586.13/808.57 = 389.39/x
  3. Step 3: Cross multiply
    586.13x = 808.57 × 389.39
  4. Step 4: Simplify right side
    586.13x = 314,849.07
  5. Step 5: Solve for x
    x = 314,849.07/586.13
  6. Step 6: Final answer
    x = 537.17

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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.