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Finding the Fourth Proportional to 1,545.57, 2,315.79 and 1,485.63

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Solution

The fourth proportional to 1,545.57, 2,315.79 and 1,485.63 is: 2,225.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,545.57 : 2,315.79 = 1,485.63 : x
  2. Step 2: Convert to fraction form
    1,545.57/2,315.79 = 1,485.63/x
  3. Step 3: Cross multiply
    1,545.57x = 2,315.79 × 1,485.63
  4. Step 4: Simplify right side
    1,545.57x = 3,440,407.10
  5. Step 5: Solve for x
    x = 3,440,407.10/1,545.57
  6. Step 6: Final answer
    x = 2,225.98

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1.5x scale

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.