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Finding the Fourth Proportional to 1,563.04, 2,157.04 and 864.40

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Solution

The fourth proportional to 1,563.04, 2,157.04 and 864.40 is: 1,192.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,563.04 : 2,157.04 = 864.40 : x
  2. Step 2: Convert to fraction form
    1,563.04/2,157.04 = 864.40/x
  3. Step 3: Cross multiply
    1,563.04x = 2,157.04 × 864.40
  4. Step 4: Simplify right side
    1,563.04x = 1,864,545.38
  5. Step 5: Solve for x
    x = 1,864,545.38/1,563.04
  6. Step 6: Final answer
    x = 1,192.90

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1.5x scale

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.