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Finding the Fourth Proportional to 660,818.15, 990,218.01 and 491,519.75

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Solution

The fourth proportional to 660,818.15, 990,218.01 and 491,519.75 is: 736,528.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,818.15 : 990,218.01 = 491,519.75 : x
  2. Step 2: Convert to fraction form
    660,818.15/990,218.01 = 491,519.75/x
  3. Step 3: Cross multiply
    660,818.15x = 990,218.01 × 491,519.75
  4. Step 4: Simplify right side
    660,818.15x = 486,711,705,612.81
  5. Step 5: Solve for x
    x = 486,711,705,612.81/660,818.15
  6. Step 6: Final answer
    x = 736,528.96

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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.