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Finding the Fourth Proportional to 672.58, 928.47 and 448.89

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Solution

The fourth proportional to 672.58, 928.47 and 448.89 is: 619.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    672.58 : 928.47 = 448.89 : x
  2. Step 2: Convert to fraction form
    672.58/928.47 = 448.89/x
  3. Step 3: Cross multiply
    672.58x = 928.47 × 448.89
  4. Step 4: Simplify right side
    672.58x = 416,779.10
  5. Step 5: Solve for x
    x = 416,779.10/672.58
  6. Step 6: Final answer
    x = 619.67

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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.