Home / 1,210.47-1,673.80-961.35

Finding the Fourth Proportional to 1,210.47, 1,673.80 and 961.35

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Solution

The fourth proportional to 1,210.47, 1,673.80 and 961.35 is: 1,329.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,210.47 : 1,673.80 = 961.35 : x
  2. Step 2: Convert to fraction form
    1,210.47/1,673.80 = 961.35/x
  3. Step 3: Cross multiply
    1,210.47x = 1,673.80 × 961.35
  4. Step 4: Simplify right side
    1,210.47x = 1,609,105.23
  5. Step 5: Solve for x
    x = 1,609,105.23/1,210.47
  6. Step 6: Final answer
    x = 1,329.32

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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.