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Finding the Fourth Proportional to 659,602.70, 989,108.40 and 260,037.80

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Solution

The fourth proportional to 659,602.70, 989,108.40 and 260,037.80 is: 389,940.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,602.70 : 989,108.40 = 260,037.80 : x
  2. Step 2: Convert to fraction form
    659,602.70/989,108.40 = 260,037.80/x
  3. Step 3: Cross multiply
    659,602.70x = 989,108.40 × 260,037.80
  4. Step 4: Simplify right side
    659,602.70x = 257,205,572,297.52
  5. Step 5: Solve for x
    x = 257,205,572,297.52/659,602.70
  6. Step 6: Final answer
    x = 389,940.14

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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.