Home / 1,637.42-2,259.54-938.78

Finding the Fourth Proportional to 1,637.42, 2,259.54 and 938.78

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Solution

The fourth proportional to 1,637.42, 2,259.54 and 938.78 is: 1,295.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.42 : 2,259.54 = 938.78 : x
  2. Step 2: Convert to fraction form
    1,637.42/2,259.54 = 938.78/x
  3. Step 3: Cross multiply
    1,637.42x = 2,259.54 × 938.78
  4. Step 4: Simplify right side
    1,637.42x = 2,121,210.96
  5. Step 5: Solve for x
    x = 2,121,210.96/1,637.42
  6. Step 6: Final answer
    x = 1,295.46

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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.