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Finding the Fourth Proportional to 423,465.28, 637,732.96 and 385,673.92

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Solution

The fourth proportional to 423,465.28, 637,732.96 and 385,673.92 is: 580,819.69

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,465.28 : 637,732.96 = 385,673.92 : x
  2. Step 2: Convert to fraction form
    423,465.28/637,732.96 = 385,673.92/x
  3. Step 3: Cross multiply
    423,465.28x = 637,732.96 × 385,673.92
  4. Step 4: Simplify right side
    423,465.28x = 245,956,970,596.40
  5. Step 5: Solve for x
    x = 245,956,970,596.40/423,465.28
  6. Step 6: Final answer
    x = 580,819.69

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.