Home / 1,545.30-2,130.94-1,021.50

Finding the Fourth Proportional to 1,545.30, 2,130.94 and 1,021.50

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Solution

The fourth proportional to 1,545.30, 2,130.94 and 1,021.50 is: 1,408.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.30 : 2,130.94 = 1,021.50 : x
  2. Step 2: Convert to fraction form
    1,545.30/2,130.94 = 1,021.50/x
  3. Step 3: Cross multiply
    1,545.30x = 2,130.94 × 1,021.50
  4. Step 4: Simplify right side
    1,545.30x = 2,176,755.21
  5. Step 5: Solve for x
    x = 2,176,755.21/1,545.30
  6. Step 6: Final answer
    x = 1,408.63

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.