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Finding the Fourth Proportional to 425,412.60, 637,965.30 and 214,980.60

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Solution

The fourth proportional to 425,412.60, 637,965.30 and 214,980.60 is: 322,393.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    425,412.60 : 637,965.30 = 214,980.60 : x
  2. Step 2: Convert to fraction form
    425,412.60/637,965.30 = 214,980.60/x
  3. Step 3: Cross multiply
    425,412.60x = 637,965.30 × 214,980.60
  4. Step 4: Simplify right side
    425,412.60x = 137,150,162,973.18
  5. Step 5: Solve for x
    x = 137,150,162,973.18/425,412.60
  6. Step 6: Final answer
    x = 322,393.28

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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.