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Finding the Fourth Proportional to 1,056.80, 1,458.20 and 614.68

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Solution

The fourth proportional to 1,056.80, 1,458.20 and 614.68 is: 848.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.80 : 1,458.20 = 614.68 : x
  2. Step 2: Convert to fraction form
    1,056.80/1,458.20 = 614.68/x
  3. Step 3: Cross multiply
    1,056.80x = 1,458.20 × 614.68
  4. Step 4: Simplify right side
    1,056.80x = 896,326.38
  5. Step 5: Solve for x
    x = 896,326.38/1,056.80
  6. Step 6: Final answer
    x = 848.15

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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.