Home / 1,547.60-2,135.69-839.44

Finding the Fourth Proportional to 1,547.60, 2,135.69 and 839.44

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Solution

The fourth proportional to 1,547.60, 2,135.69 and 839.44 is: 1,158.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,547.60 : 2,135.69 = 839.44 : x
  2. Step 2: Convert to fraction form
    1,547.60/2,135.69 = 839.44/x
  3. Step 3: Cross multiply
    1,547.60x = 2,135.69 × 839.44
  4. Step 4: Simplify right side
    1,547.60x = 1,792,785.23
  5. Step 5: Solve for x
    x = 1,792,785.23/1,547.60
  6. Step 6: Final answer
    x = 1,158.43

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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.