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Finding the Fourth Proportional to 1,725.40, 2,588.40 and 630.48

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Solution

The fourth proportional to 1,725.40, 2,588.40 and 630.48 is: 945.83

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,725.40 : 2,588.40 = 630.48 : x
  2. Step 2: Convert to fraction form
    1,725.40/2,588.40 = 630.48/x
  3. Step 3: Cross multiply
    1,725.40x = 2,588.40 × 630.48
  4. Step 4: Simplify right side
    1,725.40x = 1,631,931.28
  5. Step 5: Solve for x
    x = 1,631,931.28/1,725.40
  6. Step 6: Final answer
    x = 945.83

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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.