Home / 1,319.49-1,820.90-730.04

Finding the Fourth Proportional to 1,319.49, 1,820.90 and 730.04

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Solution

The fourth proportional to 1,319.49, 1,820.90 and 730.04 is: 1,007.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,319.49 : 1,820.90 = 730.04 : x
  2. Step 2: Convert to fraction form
    1,319.49/1,820.90 = 730.04/x
  3. Step 3: Cross multiply
    1,319.49x = 1,820.90 × 730.04
  4. Step 4: Simplify right side
    1,319.49x = 1,329,326.19
  5. Step 5: Solve for x
    x = 1,329,326.19/1,319.49
  6. Step 6: Final answer
    x = 1,007.46

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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.