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Finding the Fourth Proportional to 890.04, 1,226.76 and 677.28

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Solution

The fourth proportional to 890.04, 1,226.76 and 677.28 is: 933.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    890.04 : 1,226.76 = 677.28 : x
  2. Step 2: Convert to fraction form
    890.04/1,226.76 = 677.28/x
  3. Step 3: Cross multiply
    890.04x = 1,226.76 × 677.28
  4. Step 4: Simplify right side
    890.04x = 830,860.01
  5. Step 5: Solve for x
    x = 830,860.01/890.04
  6. Step 6: Final answer
    x = 933.51

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.