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Finding the Fourth Proportional to 1,490.78, 2,056.94 and 901.30

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Solution

The fourth proportional to 1,490.78, 2,056.94 and 901.30 is: 1,243.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,490.78 : 2,056.94 = 901.30 : x
  2. Step 2: Convert to fraction form
    1,490.78/2,056.94 = 901.30/x
  3. Step 3: Cross multiply
    1,490.78x = 2,056.94 × 901.30
  4. Step 4: Simplify right side
    1,490.78x = 1,853,928.46
  5. Step 5: Solve for x
    x = 1,853,928.46/1,490.78
  6. Step 6: Final answer
    x = 1,243.60

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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.