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Finding the Fourth Proportional to 586.05, 807.89 and 389.22

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Solution

The fourth proportional to 586.05, 807.89 and 389.22 is: 536.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    586.05 : 807.89 = 389.22 : x
  2. Step 2: Convert to fraction form
    586.05/807.89 = 389.22/x
  3. Step 3: Cross multiply
    586.05x = 807.89 × 389.22
  4. Step 4: Simplify right side
    586.05x = 314,445.00
  5. Step 5: Solve for x
    x = 314,445.00/586.05
  6. Step 6: Final answer
    x = 536.55

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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.