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Finding the Fourth Proportional to 652.04, 899.85 and 390.11

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Solution

The fourth proportional to 652.04, 899.85 and 390.11 is: 538.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    652.04 : 899.85 = 390.11 : x
  2. Step 2: Convert to fraction form
    652.04/899.85 = 390.11/x
  3. Step 3: Cross multiply
    652.04x = 899.85 × 390.11
  4. Step 4: Simplify right side
    652.04x = 351,035.98
  5. Step 5: Solve for x
    x = 351,035.98/652.04
  6. Step 6: Final answer
    x = 538.37

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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.