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Finding the Fourth Proportional to 640,228.28, 883,699.11 and 422,595.78

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Solution

The fourth proportional to 640,228.28, 883,699.11 and 422,595.78 is: 583,303.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,228.28 : 883,699.11 = 422,595.78 : x
  2. Step 2: Convert to fraction form
    640,228.28/883,699.11 = 422,595.78/x
  3. Step 3: Cross multiply
    640,228.28x = 883,699.11 × 422,595.78
  4. Step 4: Simplify right side
    640,228.28x = 373,447,514,675.76
  5. Step 5: Solve for x
    x = 373,447,514,675.76/640,228.28
  6. Step 6: Final answer
    x = 583,303.69

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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.