Home / 1,355.15-2,031.90-533.81

Finding the Fourth Proportional to 1,355.15, 2,031.90 and 533.81

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Solution

The fourth proportional to 1,355.15, 2,031.90 and 533.81 is: 800.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,355.15 : 2,031.90 = 533.81 : x
  2. Step 2: Convert to fraction form
    1,355.15/2,031.90 = 533.81/x
  3. Step 3: Cross multiply
    1,355.15x = 2,031.90 × 533.81
  4. Step 4: Simplify right side
    1,355.15x = 1,084,638.38
  5. Step 5: Solve for x
    x = 1,084,638.38/1,355.15
  6. Step 6: Final answer
    x = 800.39

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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.