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Finding the Fourth Proportional to 502,408.80, 755,362.80 and 425,426.40

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Solution

The fourth proportional to 502,408.80, 755,362.80 and 425,426.40 is: 639,621.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    502,408.80 : 755,362.80 = 425,426.40 : x
  2. Step 2: Convert to fraction form
    502,408.80/755,362.80 = 425,426.40/x
  3. Step 3: Cross multiply
    502,408.80x = 755,362.80 × 425,426.40
  4. Step 4: Simplify right side
    502,408.80x = 321,351,276,697.92
  5. Step 5: Solve for x
    x = 321,351,276,697.92/502,408.80
  6. Step 6: Final answer
    x = 639,621.11

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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.