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Finding the Fourth Proportional to 670.01, 928.55 and 659.76

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Solution

The fourth proportional to 670.01, 928.55 and 659.76 is: 914.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.01 : 928.55 = 659.76 : x
  2. Step 2: Convert to fraction form
    670.01/928.55 = 659.76/x
  3. Step 3: Cross multiply
    670.01x = 928.55 × 659.76
  4. Step 4: Simplify right side
    670.01x = 612,618.32
  5. Step 5: Solve for x
    x = 612,618.32/670.01
  6. Step 6: Final answer
    x = 914.35

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Why These Related Problems?

These problems maintain the same ratio (1.39) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.