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Finding the Fourth Proportional to 659,629.40, 989,012.10 and 260,029.40

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Solution

The fourth proportional to 659,629.40, 989,012.10 and 260,029.40 is: 389,873.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,629.40 : 989,012.10 = 260,029.40 : x
  2. Step 2: Convert to fraction form
    659,629.40/989,012.10 = 260,029.40/x
  3. Step 3: Cross multiply
    659,629.40x = 989,012.10 × 260,029.40
  4. Step 4: Simplify right side
    659,629.40x = 257,172,222,955.74
  5. Step 5: Solve for x
    x = 257,172,222,955.74/659,629.40
  6. Step 6: Final answer
    x = 389,873.80

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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.