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Finding the Fourth Proportional to 1,020.84, 1,529.34 and 508.20

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Solution

The fourth proportional to 1,020.84, 1,529.34 and 508.20 is: 761.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,020.84 : 1,529.34 = 508.20 : x
  2. Step 2: Convert to fraction form
    1,020.84/1,529.34 = 508.20/x
  3. Step 3: Cross multiply
    1,020.84x = 1,529.34 × 508.20
  4. Step 4: Simplify right side
    1,020.84x = 777,210.59
  5. Step 5: Solve for x
    x = 777,210.59/1,020.84
  6. Step 6: Final answer
    x = 761.34

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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.