Home / 1,637.36-2,261.48-1,287.60

Finding the Fourth Proportional to 1,637.36, 2,261.48 and 1,287.60

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Solution

The fourth proportional to 1,637.36, 2,261.48 and 1,287.60 is: 1,778.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,637.36 : 2,261.48 = 1,287.60 : x
  2. Step 2: Convert to fraction form
    1,637.36/2,261.48 = 1,287.60/x
  3. Step 3: Cross multiply
    1,637.36x = 2,261.48 × 1,287.60
  4. Step 4: Simplify right side
    1,637.36x = 2,911,881.65
  5. Step 5: Solve for x
    x = 2,911,881.65/1,637.36
  6. Step 6: Final answer
    x = 1,778.40

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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.