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Finding the Fourth Proportional to 763.84, 1,053.54 and 501.76

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Solution

The fourth proportional to 763.84, 1,053.54 and 501.76 is: 692.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    763.84 : 1,053.54 = 501.76 : x
  2. Step 2: Convert to fraction form
    763.84/1,053.54 = 501.76/x
  3. Step 3: Cross multiply
    763.84x = 1,053.54 × 501.76
  4. Step 4: Simplify right side
    763.84x = 528,624.23
  5. Step 5: Solve for x
    x = 528,624.23/763.84
  6. Step 6: Final answer
    x = 692.06

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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.