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Finding the Fourth Proportional to 933.70, 1,400.58 and 385.51

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Solution

The fourth proportional to 933.70, 1,400.58 and 385.51 is: 578.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    933.70 : 1,400.58 = 385.51 : x
  2. Step 2: Convert to fraction form
    933.70/1,400.58 = 385.51/x
  3. Step 3: Cross multiply
    933.70x = 1,400.58 × 385.51
  4. Step 4: Simplify right side
    933.70x = 539,937.60
  5. Step 5: Solve for x
    x = 539,937.60/933.70
  6. Step 6: Final answer
    x = 578.28

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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.