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Finding the Fourth Proportional to 912.99, 1,259.89 and 514.67

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Solution

The fourth proportional to 912.99, 1,259.89 and 514.67 is: 710.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    912.99 : 1,259.89 = 514.67 : x
  2. Step 2: Convert to fraction form
    912.99/1,259.89 = 514.67/x
  3. Step 3: Cross multiply
    912.99x = 1,259.89 × 514.67
  4. Step 4: Simplify right side
    912.99x = 648,420.00
  5. Step 5: Solve for x
    x = 648,420.00/912.99
  6. Step 6: Final answer
    x = 710.21

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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.