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Finding the Fourth Proportional to 1,680.86, 2,319.65 and 924.68

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Solution

The fourth proportional to 1,680.86, 2,319.65 and 924.68 is: 1,276.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,680.86 : 2,319.65 = 924.68 : x
  2. Step 2: Convert to fraction form
    1,680.86/2,319.65 = 924.68/x
  3. Step 3: Cross multiply
    1,680.86x = 2,319.65 × 924.68
  4. Step 4: Simplify right side
    1,680.86x = 2,144,923.38
  5. Step 5: Solve for x
    x = 2,144,923.38/1,680.86
  6. Step 6: Final answer
    x = 1,276.08

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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.