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Finding the Fourth Proportional to 978,149.10, 1,467,296.55 and 346,980.90

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Solution

The fourth proportional to 978,149.10, 1,467,296.55 and 346,980.90 is: 520,497.21

Step by Step Solution

  1. Step 1: Write the proportion equation
    978,149.10 : 1,467,296.55 = 346,980.90 : x
  2. Step 2: Convert to fraction form
    978,149.10/1,467,296.55 = 346,980.90/x
  3. Step 3: Cross multiply
    978,149.10x = 1,467,296.55 × 346,980.90
  4. Step 4: Simplify right side
    978,149.10x = 509,123,877,485.90
  5. Step 5: Solve for x
    x = 509,123,877,485.90/978,149.10
  6. Step 6: Final answer
    x = 520,497.21

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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.