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Finding the Fourth Proportional to 659,606.20, 989,113.65 and 260,041.30

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Solution

The fourth proportional to 659,606.20, 989,113.65 and 260,041.30 is: 389,945.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,606.20 : 989,113.65 = 260,041.30 : x
  2. Step 2: Convert to fraction form
    659,606.20/989,113.65 = 260,041.30/x
  3. Step 3: Cross multiply
    659,606.20x = 989,113.65 × 260,041.30
  4. Step 4: Simplify right side
    659,606.20x = 257,210,399,393.75
  5. Step 5: Solve for x
    x = 257,210,399,393.75/659,606.20
  6. Step 6: Final answer
    x = 389,945.39

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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.