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Finding the Fourth Proportional to 640,268.15, 883,754.09 and 422,635.67

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Solution

The fourth proportional to 640,268.15, 883,754.09 and 422,635.67 is: 583,358.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,268.15 : 883,754.09 = 422,635.67 : x
  2. Step 2: Convert to fraction form
    640,268.15/883,754.09 = 422,635.67/x
  3. Step 3: Cross multiply
    640,268.15x = 883,754.09 × 422,635.67
  4. Step 4: Simplify right side
    640,268.15x = 373,506,005,280.52
  5. Step 5: Solve for x
    x = 373,506,005,280.52/640,268.15
  6. Step 6: Final answer
    x = 583,358.72

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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.