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Finding the Fourth Proportional to 720.66, 993.78 and 510.60

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Solution

The fourth proportional to 720.66, 993.78 and 510.60 is: 704.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    720.66 : 993.78 = 510.60 : x
  2. Step 2: Convert to fraction form
    720.66/993.78 = 510.60/x
  3. Step 3: Cross multiply
    720.66x = 993.78 × 510.60
  4. Step 4: Simplify right side
    720.66x = 507,424.07
  5. Step 5: Solve for x
    x = 507,424.07/720.66
  6. Step 6: Final answer
    x = 704.11

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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.