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Finding the Fourth Proportional to 2,938.04, 4,407.71 and 990.19

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Solution

The fourth proportional to 2,938.04, 4,407.71 and 990.19 is: 1,485.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    2,938.04 : 4,407.71 = 990.19 : x
  2. Step 2: Convert to fraction form
    2,938.04/4,407.71 = 990.19/x
  3. Step 3: Cross multiply
    2,938.04x = 4,407.71 × 990.19
  4. Step 4: Simplify right side
    2,938.04x = 4,364,454.39
  5. Step 5: Solve for x
    x = 4,364,454.39/2,938.04
  6. Step 6: Final answer
    x = 1,485.50

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 (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.