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Finding the Fourth Proportional to 1,056.78, 1,582.65 and 901.86

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Solution

The fourth proportional to 1,056.78, 1,582.65 and 901.86 is: 1,350.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,056.78 : 1,582.65 = 901.86 : x
  2. Step 2: Convert to fraction form
    1,056.78/1,582.65 = 901.86/x
  3. Step 3: Cross multiply
    1,056.78x = 1,582.65 × 901.86
  4. Step 4: Simplify right side
    1,056.78x = 1,427,328.73
  5. Step 5: Solve for x
    x = 1,427,328.73/1,056.78
  6. Step 6: Final answer
    x = 1,350.64

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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.