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Finding the Fourth Proportional to 659,610.10, 989,415.15 and 393,670.90

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Solution

The fourth proportional to 659,610.10, 989,415.15 and 393,670.90 is: 590,506.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    659,610.10 : 989,415.15 = 393,670.90 : x
  2. Step 2: Convert to fraction form
    659,610.10/989,415.15 = 393,670.90/x
  3. Step 3: Cross multiply
    659,610.10x = 989,415.15 × 393,670.90
  4. Step 4: Simplify right side
    659,610.10x = 389,503,952,574.14
  5. Step 5: Solve for x
    x = 389,503,952,574.14/659,610.10
  6. Step 6: Final answer
    x = 590,506.35

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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.