Home / 1,216,428,065.36-1,678,706,142.92-687,780,701.36

Finding the Fourth Proportional to 1,216,428,065.36, 1,678,706,142.92 and 687,780,701.36

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Solution

The fourth proportional to 1,216,428,065.36, 1,678,706,142.92 and 687,780,701.36 is: 949,157,390.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,216,428,065.36 : 1,678,706,142.92 = 687,780,701.36 : x
  2. Step 2: Convert to fraction form
    1,216,428,065.36/1,678,706,142.92 = 687,780,701.36/x
  3. Step 3: Cross multiply
    1,216,428,065.36x = 1,678,706,142.92 × 687,780,701.36
  4. Step 4: Simplify right side
    1,216,428,065.36x = 1,154,581,688,354,857,984
  5. Step 5: Solve for x
    x = 1,154,581,688,354,857,984/1,216,428,065.36
  6. Step 6: Final answer
    x = 949,157,390.59

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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.