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Finding the Fourth Proportional to 903.25, 1,355.64 and 410.40

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Solution

The fourth proportional to 903.25, 1,355.64 and 410.40 is: 615.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.25 : 1,355.64 = 410.40 : x
  2. Step 2: Convert to fraction form
    903.25/1,355.64 = 410.40/x
  3. Step 3: Cross multiply
    903.25x = 1,355.64 × 410.40
  4. Step 4: Simplify right side
    903.25x = 556,354.66
  5. Step 5: Solve for x
    x = 556,354.66/903.25
  6. Step 6: Final answer
    x = 615.95

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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.