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Finding the Fourth Proportional to 448.76, 619.64 and 291.50

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Solution

The fourth proportional to 448.76, 619.64 and 291.50 is: 402.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    448.76 : 619.64 = 291.50 : x
  2. Step 2: Convert to fraction form
    448.76/619.64 = 291.50/x
  3. Step 3: Cross multiply
    448.76x = 619.64 × 291.50
  4. Step 4: Simplify right side
    448.76x = 180,620.50
  5. Step 5: Solve for x
    x = 180,620.50/448.76
  6. Step 6: Final answer
    x = 402.49

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Find fourth proportional to 224.38, 309.82 and 145.75
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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.