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Finding the Fourth Proportional to 638,021.80, 955,851.90 and 371,909.80

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Solution

The fourth proportional to 638,021.80, 955,851.90 and 371,909.80 is: 557,176.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,021.80 : 955,851.90 = 371,909.80 : x
  2. Step 2: Convert to fraction form
    638,021.80/955,851.90 = 371,909.80/x
  3. Step 3: Cross multiply
    638,021.80x = 955,851.90 × 371,909.80
  4. Step 4: Simplify right side
    638,021.80x = 355,490,688,958.62
  5. Step 5: Solve for x
    x = 355,490,688,958.62/638,021.80
  6. Step 6: Final answer
    x = 557,176.40

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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.