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Finding the Fourth Proportional to 425,723.60, 637,807.80 and 346,408.40

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Solution

The fourth proportional to 425,723.60, 637,807.80 and 346,408.40 is: 518,979.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,723.60 : 637,807.80 = 346,408.40 : x
  2. Step 2: Convert to fraction form
    425,723.60/637,807.80 = 346,408.40/x
  3. Step 3: Cross multiply
    425,723.60x = 637,807.80 × 346,408.40
  4. Step 4: Simplify right side
    425,723.60x = 220,941,979,505.52
  5. Step 5: Solve for x
    x = 220,941,979,505.52/425,723.60
  6. Step 6: Final answer
    x = 518,979.87

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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.