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Finding the Fourth Proportional to 1,028.77, 1,420.16 and 656.24

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Solution

The fourth proportional to 1,028.77, 1,420.16 and 656.24 is: 905.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,028.77 : 1,420.16 = 656.24 : x
  2. Step 2: Convert to fraction form
    1,028.77/1,420.16 = 656.24/x
  3. Step 3: Cross multiply
    1,028.77x = 1,420.16 × 656.24
  4. Step 4: Simplify right side
    1,028.77x = 931,955.42
  5. Step 5: Solve for x
    x = 931,955.42/1,028.77
  6. Step 6: Final answer
    x = 905.90

Related Problems

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Half scale
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Double scale
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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.