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Finding the Fourth Proportional to 898.19, 1,347.80 and 404.45

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Solution

The fourth proportional to 898.19, 1,347.80 and 404.45 is: 606.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    898.19 : 1,347.80 = 404.45 : x
  2. Step 2: Convert to fraction form
    898.19/1,347.80 = 404.45/x
  3. Step 3: Cross multiply
    898.19x = 1,347.80 × 404.45
  4. Step 4: Simplify right side
    898.19x = 545,108.95
  5. Step 5: Solve for x
    x = 545,108.95/898.19
  6. Step 6: Final answer
    x = 606.90

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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.