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Finding the Fourth Proportional to 519.75, 715.16 and 501.80

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Solution

The fourth proportional to 519.75, 715.16 and 501.80 is: 690.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    519.75 : 715.16 = 501.80 : x
  2. Step 2: Convert to fraction form
    519.75/715.16 = 501.80/x
  3. Step 3: Cross multiply
    519.75x = 715.16 × 501.80
  4. Step 4: Simplify right side
    519.75x = 358,861.20
  5. Step 5: Solve for x
    x = 358,861.20/519.75
  6. Step 6: Final answer
    x = 690.45

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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.