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Finding the Fourth Proportional to 659,868.40, 989,401.65 and 260,048.35

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Solution

The fourth proportional to 659,868.40, 989,401.65 and 260,048.35 is: 389,914.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,868.40 : 989,401.65 = 260,048.35 : x
  2. Step 2: Convert to fraction form
    659,868.40/989,401.65 = 260,048.35/x
  3. Step 3: Cross multiply
    659,868.40x = 989,401.65 × 260,048.35
  4. Step 4: Simplify right side
    659,868.40x = 257,292,266,569.78
  5. Step 5: Solve for x
    x = 257,292,266,569.78/659,868.40
  6. Step 6: Final answer
    x = 389,914.51

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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.