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Finding the Fourth Proportional to 659,417.80, 987,960.30 and 617,427.40

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Solution

The fourth proportional to 659,417.80, 987,960.30 and 617,427.40 is: 925,048.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,417.80 : 987,960.30 = 617,427.40 : x
  2. Step 2: Convert to fraction form
    659,417.80/987,960.30 = 617,427.40/x
  3. Step 3: Cross multiply
    659,417.80x = 987,960.30 × 617,427.40
  4. Step 4: Simplify right side
    659,417.80x = 609,993,759,332.22
  5. Step 5: Solve for x
    x = 609,993,759,332.22/659,417.80
  6. Step 6: Final answer
    x = 925,048.97

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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.