Home / 699,986.28-966,053.64-428,235.20

Finding the Fourth Proportional to 699,986.28, 966,053.64 and 428,235.20

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Solution

The fourth proportional to 699,986.28, 966,053.64 and 428,235.20 is: 591,008.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    699,986.28 : 966,053.64 = 428,235.20 : x
  2. Step 2: Convert to fraction form
    699,986.28/966,053.64 = 428,235.20/x
  3. Step 3: Cross multiply
    699,986.28x = 966,053.64 × 428,235.20
  4. Step 4: Simplify right side
    699,986.28x = 413,698,173,736.13
  5. Step 5: Solve for x
    x = 413,698,173,736.13/699,986.28
  6. Step 6: Final answer
    x = 591,008.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.