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Finding the Fourth Proportional to 659,416.80, 987,958.80 and 617,426.40

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Solution

The fourth proportional to 659,416.80, 987,958.80 and 617,426.40 is: 925,047.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,416.80 : 987,958.80 = 617,426.40 : x
  2. Step 2: Convert to fraction form
    659,416.80/987,958.80 = 617,426.40/x
  3. Step 3: Cross multiply
    659,416.80x = 987,958.80 × 617,426.40
  4. Step 4: Simplify right side
    659,416.80x = 609,991,845,232.32
  5. Step 5: Solve for x
    x = 609,991,845,232.32/659,416.80
  6. Step 6: Final answer
    x = 925,047.47

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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.