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Finding the Fourth Proportional to 426,189.60, 638,506.80 and 346,874.40

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Solution

The fourth proportional to 426,189.60, 638,506.80 and 346,874.40 is: 519,678.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,189.60 : 638,506.80 = 346,874.40 : x
  2. Step 2: Convert to fraction form
    426,189.60/638,506.80 = 346,874.40/x
  3. Step 3: Cross multiply
    426,189.60x = 638,506.80 × 346,874.40
  4. Step 4: Simplify right side
    426,189.60x = 221,481,663,145.92
  5. Step 5: Solve for x
    x = 221,481,663,145.92/426,189.60
  6. Step 6: Final answer
    x = 519,678.71

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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.