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Finding the Fourth Proportional to 670.56, 1,006.62 and 617.46

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Solution

The fourth proportional to 670.56, 1,006.62 and 617.46 is: 926.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.56 : 1,006.62 = 617.46 : x
  2. Step 2: Convert to fraction form
    670.56/1,006.62 = 617.46/x
  3. Step 3: Cross multiply
    670.56x = 1,006.62 × 617.46
  4. Step 4: Simplify right side
    670.56x = 621,547.59
  5. Step 5: Solve for x
    x = 621,547.59/670.56
  6. Step 6: Final answer
    x = 926.91

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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.