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Finding the Fourth Proportional to 734.12, 1,012.99 and 419.39

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Solution

The fourth proportional to 734.12, 1,012.99 and 419.39 is: 578.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.12 : 1,012.99 = 419.39 : x
  2. Step 2: Convert to fraction form
    734.12/1,012.99 = 419.39/x
  3. Step 3: Cross multiply
    734.12x = 1,012.99 × 419.39
  4. Step 4: Simplify right side
    734.12x = 424,837.88
  5. Step 5: Solve for x
    x = 424,837.88/734.12
  6. Step 6: Final answer
    x = 578.70

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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.