Home / 1,680.48-2,318.72-972.16

Finding the Fourth Proportional to 1,680.48, 2,318.72 and 972.16

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Solution

The fourth proportional to 1,680.48, 2,318.72 and 972.16 is: 1,341.38

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.48 : 2,318.72 = 972.16 : x
  2. Step 2: Convert to fraction form
    1,680.48/2,318.72 = 972.16/x
  3. Step 3: Cross multiply
    1,680.48x = 2,318.72 × 972.16
  4. Step 4: Simplify right side
    1,680.48x = 2,254,166.84
  5. Step 5: Solve for x
    x = 2,254,166.84/1,680.48
  6. Step 6: Final answer
    x = 1,341.38

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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.