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Finding the Fourth Proportional to 734.99, 1,014.35 and 420.36

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Solution

The fourth proportional to 734.99, 1,014.35 and 420.36 is: 580.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    734.99 : 1,014.35 = 420.36 : x
  2. Step 2: Convert to fraction form
    734.99/1,014.35 = 420.36/x
  3. Step 3: Cross multiply
    734.99x = 1,014.35 × 420.36
  4. Step 4: Simplify right side
    734.99x = 426,390.06
  5. Step 5: Solve for x
    x = 426,390.06/734.99
  6. Step 6: Final answer
    x = 580.13

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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.