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Finding the Fourth Proportional to 1,007.45, 1,388.98 and 652.75

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Solution

The fourth proportional to 1,007.45, 1,388.98 and 652.75 is: 899.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,007.45 : 1,388.98 = 652.75 : x
  2. Step 2: Convert to fraction form
    1,007.45/1,388.98 = 652.75/x
  3. Step 3: Cross multiply
    1,007.45x = 1,388.98 × 652.75
  4. Step 4: Simplify right side
    1,007.45x = 906,659.25
  5. Step 5: Solve for x
    x = 906,659.25/1,007.45
  6. Step 6: Final answer
    x = 899.95

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1.5x scale

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.