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Finding the Fourth Proportional to 586.21, 808.23 and 428.71

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Solution

The fourth proportional to 586.21, 808.23 and 428.71 is: 591.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.21 : 808.23 = 428.71 : x
  2. Step 2: Convert to fraction form
    586.21/808.23 = 428.71/x
  3. Step 3: Cross multiply
    586.21x = 808.23 × 428.71
  4. Step 4: Simplify right side
    586.21x = 346,496.28
  5. Step 5: Solve for x
    x = 346,496.28/586.21
  6. Step 6: Final answer
    x = 591.08

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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.