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Finding the Fourth Proportional to 858,846.65, 1,287,741 and 290,174.03

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Solution

The fourth proportional to 858,846.65, 1,287,741 and 290,174.03 is: 435,082.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    858,846.65 : 1,287,741 = 290,174.03 : x
  2. Step 2: Convert to fraction form
    858,846.65/1,287,741 = 290,174.03/x
  3. Step 3: Cross multiply
    858,846.65x = 1,287,741 × 290,174.03
  4. Step 4: Simplify right side
    858,846.65x = 373,668,989,127.53
  5. Step 5: Solve for x
    x = 373,668,989,127.53/858,846.65
  6. Step 6: Final answer
    x = 435,082.32

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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.