Home / 1,317.90-1,975.28-614.16

Finding the Fourth Proportional to 1,317.90, 1,975.28 and 614.16

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Solution

The fourth proportional to 1,317.90, 1,975.28 and 614.16 is: 920.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,317.90 : 1,975.28 = 614.16 : x
  2. Step 2: Convert to fraction form
    1,317.90/1,975.28 = 614.16/x
  3. Step 3: Cross multiply
    1,317.90x = 1,975.28 × 614.16
  4. Step 4: Simplify right side
    1,317.90x = 1,213,137.96
  5. Step 5: Solve for x
    x = 1,213,137.96/1,317.90
  6. Step 6: Final answer
    x = 920.51

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1.5x scale

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.