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Finding the Fourth Proportional to 909.20, 1,362.68 and 584.08

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Solution

The fourth proportional to 909.20, 1,362.68 and 584.08 is: 875.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    909.20 : 1,362.68 = 584.08 : x
  2. Step 2: Convert to fraction form
    909.20/1,362.68 = 584.08/x
  3. Step 3: Cross multiply
    909.20x = 1,362.68 × 584.08
  4. Step 4: Simplify right side
    909.20x = 795,914.13
  5. Step 5: Solve for x
    x = 795,914.13/909.20
  6. Step 6: Final answer
    x = 875.40

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.