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Finding the Fourth Proportional to 1,029.19, 1,420.27 and 587.09

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Solution

The fourth proportional to 1,029.19, 1,420.27 and 587.09 is: 810.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,029.19 : 1,420.27 = 587.09 : x
  2. Step 2: Convert to fraction form
    1,029.19/1,420.27 = 587.09/x
  3. Step 3: Cross multiply
    1,029.19x = 1,420.27 × 587.09
  4. Step 4: Simplify right side
    1,029.19x = 833,826.31
  5. Step 5: Solve for x
    x = 833,826.31/1,029.19
  6. Step 6: Final answer
    x = 810.18

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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.