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Finding the Fourth Proportional to 640,341.74, 883,856.25 and 422,709.72

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Solution

The fourth proportional to 640,341.74, 883,856.25 and 422,709.72 is: 583,461.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    640,341.74 : 883,856.25 = 422,709.72 : x
  2. Step 2: Convert to fraction form
    640,341.74/883,856.25 = 422,709.72/x
  3. Step 3: Cross multiply
    640,341.74x = 883,856.25 × 422,709.72
  4. Step 4: Simplify right side
    640,341.74x = 373,614,627,957.75
  5. Step 5: Solve for x
    x = 373,614,627,957.75/640,341.74
  6. Step 6: Final answer
    x = 583,461.31

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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.