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Finding the Fourth Proportional to 856.02, 1,180.50 and 659.18

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Solution

The fourth proportional to 856.02, 1,180.50 and 659.18 is: 909.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    856.02 : 1,180.50 = 659.18 : x
  2. Step 2: Convert to fraction form
    856.02/1,180.50 = 659.18/x
  3. Step 3: Cross multiply
    856.02x = 1,180.50 × 659.18
  4. Step 4: Simplify right side
    856.02x = 778,161.99
  5. Step 5: Solve for x
    x = 778,161.99/856.02
  6. Step 6: Final answer
    x = 909.05

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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.