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Finding the Fourth Proportional to 425,665.60, 637,720.80 and 346,350.40

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Solution

The fourth proportional to 425,665.60, 637,720.80 and 346,350.40 is: 518,892.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,665.60 : 637,720.80 = 346,350.40 : x
  2. Step 2: Convert to fraction form
    425,665.60/637,720.80 = 346,350.40/x
  3. Step 3: Cross multiply
    425,665.60x = 637,720.80 × 346,350.40
  4. Step 4: Simplify right side
    425,665.60x = 220,874,854,168.32
  5. Step 5: Solve for x
    x = 220,874,854,168.32/425,665.60
  6. Step 6: Final answer
    x = 518,892.89

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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.