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Finding the Fourth Proportional to 899.21, 1,240.53 and 703.19

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Solution

The fourth proportional to 899.21, 1,240.53 and 703.19 is: 970.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.21 : 1,240.53 = 703.19 : x
  2. Step 2: Convert to fraction form
    899.21/1,240.53 = 703.19/x
  3. Step 3: Cross multiply
    899.21x = 1,240.53 × 703.19
  4. Step 4: Simplify right side
    899.21x = 872,328.29
  5. Step 5: Solve for x
    x = 872,328.29/899.21
  6. Step 6: Final answer
    x = 970.11

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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.