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Finding the Fourth Proportional to 903.61, 1,245.63 and 623.37

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Solution

The fourth proportional to 903.61, 1,245.63 and 623.37 is: 859.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    903.61 : 1,245.63 = 623.37 : x
  2. Step 2: Convert to fraction form
    903.61/1,245.63 = 623.37/x
  3. Step 3: Cross multiply
    903.61x = 1,245.63 × 623.37
  4. Step 4: Simplify right side
    903.61x = 776,488.37
  5. Step 5: Solve for x
    x = 776,488.37/903.61
  6. Step 6: Final answer
    x = 859.32

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Double scale
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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.