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Finding the Fourth Proportional to 561,994.20, 842,991.30 and 338,045.40

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Solution

The fourth proportional to 561,994.20, 842,991.30 and 338,045.40 is: 507,068.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,994.20 : 842,991.30 = 338,045.40 : x
  2. Step 2: Convert to fraction form
    561,994.20/842,991.30 = 338,045.40/x
  3. Step 3: Cross multiply
    561,994.20x = 842,991.30 × 338,045.40
  4. Step 4: Simplify right side
    561,994.20x = 284,969,331,205.02
  5. Step 5: Solve for x
    x = 284,969,331,205.02/561,994.20
  6. Step 6: Final answer
    x = 507,068.10

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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.