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Finding the Fourth Proportional to 903.23, 1,245.09 and 706.40

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Solution

The fourth proportional to 903.23, 1,245.09 and 706.40 is: 973.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.23 : 1,245.09 = 706.40 : x
  2. Step 2: Convert to fraction form
    903.23/1,245.09 = 706.40/x
  3. Step 3: Cross multiply
    903.23x = 1,245.09 × 706.40
  4. Step 4: Simplify right side
    903.23x = 879,521.82
  5. Step 5: Solve for x
    x = 879,521.82/903.23
  6. Step 6: Final answer
    x = 973.76

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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.