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Finding the Fourth Proportional to 1,284.61, 1,772.76 and 695.14

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Solution

The fourth proportional to 1,284.61, 1,772.76 and 695.14 is: 959.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,284.61 : 1,772.76 = 695.14 : x
  2. Step 2: Convert to fraction form
    1,284.61/1,772.76 = 695.14/x
  3. Step 3: Cross multiply
    1,284.61x = 1,772.76 × 695.14
  4. Step 4: Simplify right side
    1,284.61x = 1,232,325.07
  5. Step 5: Solve for x
    x = 1,232,325.07/1,284.61
  6. Step 6: Final answer
    x = 959.30

Related Problems

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Half scale
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Double scale
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Similar ratio
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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.