Home / 1,417.20-1,955.34-920.13

Finding the Fourth Proportional to 1,417.20, 1,955.34 and 920.13

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Solution

The fourth proportional to 1,417.20, 1,955.34 and 920.13 is: 1,269.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,417.20 : 1,955.34 = 920.13 : x
  2. Step 2: Convert to fraction form
    1,417.20/1,955.34 = 920.13/x
  3. Step 3: Cross multiply
    1,417.20x = 1,955.34 × 920.13
  4. Step 4: Simplify right side
    1,417.20x = 1,799,166.99
  5. Step 5: Solve for x
    x = 1,799,166.99/1,417.20
  6. Step 6: Final answer
    x = 1,269.52

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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.