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Finding the Fourth Proportional to 644,091.96, 887,384.64 and 498,396.72

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Solution

The fourth proportional to 644,091.96, 887,384.64 and 498,396.72 is: 686,655.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,091.96 : 887,384.64 = 498,396.72 : x
  2. Step 2: Convert to fraction form
    644,091.96/887,384.64 = 498,396.72/x
  3. Step 3: Cross multiply
    644,091.96x = 887,384.64 × 498,396.72
  4. Step 4: Simplify right side
    644,091.96x = 442,269,593,954.38
  5. Step 5: Solve for x
    x = 442,269,593,954.38/644,091.96
  6. Step 6: Final answer
    x = 686,655.98

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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.