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Finding the Fourth Proportional to 659,504.20, 989,061.90 and 260,012.20

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Solution

The fourth proportional to 659,504.20, 989,061.90 and 260,012.20 is: 389,941.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,504.20 : 989,061.90 = 260,012.20 : x
  2. Step 2: Convert to fraction form
    659,504.20/989,061.90 = 260,012.20/x
  3. Step 3: Cross multiply
    659,504.20x = 989,061.90 × 260,012.20
  4. Step 4: Simplify right side
    659,504.20x = 257,168,160,555.18
  5. Step 5: Solve for x
    x = 257,168,160,555.18/659,504.20
  6. Step 6: Final answer
    x = 389,941.66

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1.5x scale

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.