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Finding the Fourth Proportional to 903.48, 1,355.40 and 470.52

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Solution

The fourth proportional to 903.48, 1,355.40 and 470.52 is: 705.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.48 : 1,355.40 = 470.52 : x
  2. Step 2: Convert to fraction form
    903.48/1,355.40 = 470.52/x
  3. Step 3: Cross multiply
    903.48x = 1,355.40 × 470.52
  4. Step 4: Simplify right side
    903.48x = 637,742.81
  5. Step 5: Solve for x
    x = 637,742.81/903.48
  6. Step 6: Final answer
    x = 705.87

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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.