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Finding the Fourth Proportional to 693.90, 1,041.03 and 507.20

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Solution

The fourth proportional to 693.90, 1,041.03 and 507.20 is: 760.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    693.90 : 1,041.03 = 507.20 : x
  2. Step 2: Convert to fraction form
    693.90/1,041.03 = 507.20/x
  3. Step 3: Cross multiply
    693.90x = 1,041.03 × 507.20
  4. Step 4: Simplify right side
    693.90x = 528,005.21
  5. Step 5: Solve for x
    x = 528,005.21/693.90
  6. Step 6: Final answer
    x = 760.92

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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.