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Finding the Fourth Proportional to 934.07, 1,400.99 and 386.18

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Solution

The fourth proportional to 934.07, 1,400.99 and 386.18 is: 579.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    934.07 : 1,400.99 = 386.18 : x
  2. Step 2: Convert to fraction form
    934.07/1,400.99 = 386.18/x
  3. Step 3: Cross multiply
    934.07x = 1,400.99 × 386.18
  4. Step 4: Simplify right side
    934.07x = 541,038.79
  5. Step 5: Solve for x
    x = 541,038.79/934.07
  6. Step 6: Final answer
    x = 579.23

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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.