Home / 1,315.13-1,973.30-666.32

Finding the Fourth Proportional to 1,315.13, 1,973.30 and 666.32

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Solution

The fourth proportional to 1,315.13, 1,973.30 and 666.32 is: 999.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,315.13 : 1,973.30 = 666.32 : x
  2. Step 2: Convert to fraction form
    1,315.13/1,973.30 = 666.32/x
  3. Step 3: Cross multiply
    1,315.13x = 1,973.30 × 666.32
  4. Step 4: Simplify right side
    1,315.13x = 1,314,836.06
  5. Step 5: Solve for x
    x = 1,314,836.06/1,315.13
  6. Step 6: Final answer
    x = 999.78

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.