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Finding the Fourth Proportional to 670.02, 1,004.64 and 258.80

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Solution

The fourth proportional to 670.02, 1,004.64 and 258.80 is: 388.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    670.02 : 1,004.64 = 258.80 : x
  2. Step 2: Convert to fraction form
    670.02/1,004.64 = 258.80/x
  3. Step 3: Cross multiply
    670.02x = 1,004.64 × 258.80
  4. Step 4: Simplify right side
    670.02x = 260,000.83
  5. Step 5: Solve for x
    x = 260,000.83/670.02
  6. Step 6: Final answer
    x = 388.05

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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.