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Finding the Fourth Proportional to 659,611.80, 989,417.70 and 210,329.10

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Solution

The fourth proportional to 659,611.80, 989,417.70 and 210,329.10 is: 315,493.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,611.80 : 989,417.70 = 210,329.10 : x
  2. Step 2: Convert to fraction form
    659,611.80/989,417.70 = 210,329.10/x
  3. Step 3: Cross multiply
    659,611.80x = 989,417.70 × 210,329.10
  4. Step 4: Simplify right side
    659,611.80x = 208,103,334,365.07
  5. Step 5: Solve for x
    x = 208,103,334,365.07/659,611.80
  6. Step 6: Final answer
    x = 315,493.65

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Similar ratio
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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.