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Finding the Fourth Proportional to 3,124.64, 4,686.78 and 933.42

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Solution

The fourth proportional to 3,124.64, 4,686.78 and 933.42 is: 1,400.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    3,124.64 : 4,686.78 = 933.42 : x
  2. Step 2: Convert to fraction form
    3,124.64/4,686.78 = 933.42/x
  3. Step 3: Cross multiply
    3,124.64x = 4,686.78 × 933.42
  4. Step 4: Simplify right side
    3,124.64x = 4,374,734.19
  5. Step 5: Solve for x
    x = 4,374,734.19/3,124.64
  6. Step 6: Final answer
    x = 1,400.08

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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.