Home / 1,045.89-1,569.09-429.59

Finding the Fourth Proportional to 1,045.89, 1,569.09 and 429.59

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Solution

The fourth proportional to 1,045.89, 1,569.09 and 429.59 is: 644.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,045.89 : 1,569.09 = 429.59 : x
  2. Step 2: Convert to fraction form
    1,045.89/1,569.09 = 429.59/x
  3. Step 3: Cross multiply
    1,045.89x = 1,569.09 × 429.59
  4. Step 4: Simplify right side
    1,045.89x = 674,057.53
  5. Step 5: Solve for x
    x = 674,057.53/1,045.89
  6. Step 6: Final answer
    x = 644.48

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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.