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Finding the Fourth Proportional to 638,680.84, 956,464.98 and 422,407.81

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Solution

The fourth proportional to 638,680.84, 956,464.98 and 422,407.81 is: 632,582.43

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,680.84 : 956,464.98 = 422,407.81 : x
  2. Step 2: Convert to fraction form
    638,680.84/956,464.98 = 422,407.81/x
  3. Step 3: Cross multiply
    638,680.84x = 956,464.98 × 422,407.81
  4. Step 4: Simplify right side
    638,680.84x = 404,018,277,543.49
  5. Step 5: Solve for x
    x = 404,018,277,543.49/638,680.84
  6. Step 6: Final answer
    x = 632,582.43

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.