Home / 1,192,347,989.40-1,645,439,898.78-663,700,517.40

Finding the Fourth Proportional to 1,192,347,989.40, 1,645,439,898.78 and 663,700,517.40

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Solution

The fourth proportional to 1,192,347,989.40, 1,645,439,898.78 and 663,700,517.40 is: 915,906,532.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,192,347,989.40 : 1,645,439,898.78 = 663,700,517.40 : x
  2. Step 2: Convert to fraction form
    1,192,347,989.40/1,645,439,898.78 = 663,700,517.40/x
  3. Step 3: Cross multiply
    1,192,347,989.40x = 1,645,439,898.78 × 663,700,517.40
  4. Step 4: Simplify right side
    1,192,347,989.40x = 1,092,079,312,170,889,600
  5. Step 5: Solve for x
    x = 1,092,079,312,170,889,600/1,192,347,989.40
  6. Step 6: Final answer
    x = 915,906,532.22

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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.