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Finding the Fourth Proportional to 902.47, 1,245.40 and 509.49

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Solution

The fourth proportional to 902.47, 1,245.40 and 509.49 is: 703.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    902.47 : 1,245.40 = 509.49 : x
  2. Step 2: Convert to fraction form
    902.47/1,245.40 = 509.49/x
  3. Step 3: Cross multiply
    902.47x = 1,245.40 × 509.49
  4. Step 4: Simplify right side
    902.47x = 634,518.85
  5. Step 5: Solve for x
    x = 634,518.85/902.47
  6. Step 6: Final answer
    x = 703.09

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1.5x scale

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.