Home / 1,317.90-1,979.58-1,045.88

Finding the Fourth Proportional to 1,317.90, 1,979.58 and 1,045.88

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Solution

The fourth proportional to 1,317.90, 1,979.58 and 1,045.88 is: 1,570.99

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.90 : 1,979.58 = 1,045.88 : x
  2. Step 2: Convert to fraction form
    1,317.90/1,979.58 = 1,045.88/x
  3. Step 3: Cross multiply
    1,317.90x = 1,979.58 × 1,045.88
  4. Step 4: Simplify right side
    1,317.90x = 2,070,403.13
  5. Step 5: Solve for x
    x = 2,070,403.13/1,317.90
  6. Step 6: Final answer
    x = 1,570.99

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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.