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Finding the Fourth Proportional to 1,555.86, 2,333.58 and 631.43

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Solution

The fourth proportional to 1,555.86, 2,333.58 and 631.43 is: 947.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,555.86 : 2,333.58 = 631.43 : x
  2. Step 2: Convert to fraction form
    1,555.86/2,333.58 = 631.43/x
  3. Step 3: Cross multiply
    1,555.86x = 2,333.58 × 631.43
  4. Step 4: Simplify right side
    1,555.86x = 1,473,480.75
  5. Step 5: Solve for x
    x = 1,473,480.75/1,555.86
  6. Step 6: Final answer
    x = 947.05

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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.