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Finding the Fourth Proportional to 903.34, 1,355.28 and 470.80

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Solution

The fourth proportional to 903.34, 1,355.28 and 470.80 is: 706.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.34 : 1,355.28 = 470.80 : x
  2. Step 2: Convert to fraction form
    903.34/1,355.28 = 470.80/x
  3. Step 3: Cross multiply
    903.34x = 1,355.28 × 470.80
  4. Step 4: Simplify right side
    903.34x = 638,065.82
  5. Step 5: Solve for x
    x = 638,065.82/903.34
  6. Step 6: Final answer
    x = 706.34

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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.