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Finding the Fourth Proportional to 758.08, 1,045.63 and 478.67

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Solution

The fourth proportional to 758.08, 1,045.63 and 478.67 is: 660.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    758.08 : 1,045.63 = 478.67 : x
  2. Step 2: Convert to fraction form
    758.08/1,045.63 = 478.67/x
  3. Step 3: Cross multiply
    758.08x = 1,045.63 × 478.67
  4. Step 4: Simplify right side
    758.08x = 500,511.37
  5. Step 5: Solve for x
    x = 500,511.37/758.08
  6. Step 6: Final answer
    x = 660.24

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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.