Home / 520,220,715.64-780,136,654.56-209,223,361.72

Finding the Fourth Proportional to 520,220,715.64, 780,136,654.56 and 209,223,361.72

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Solution

The fourth proportional to 520,220,715.64, 780,136,654.56 and 209,223,361.72 is: 313,756,850.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    520,220,715.64 : 780,136,654.56 = 209,223,361.72 : x
  2. Step 2: Convert to fraction form
    520,220,715.64/780,136,654.56 = 209,223,361.72/x
  3. Step 3: Cross multiply
    520,220,715.64x = 780,136,654.56 × 209,223,361.72
  4. Step 4: Simplify right side
    520,220,715.64x = 163,222,813,468,037,568
  5. Step 5: Solve for x
    x = 163,222,813,468,037,568/520,220,715.64
  6. Step 6: Final answer
    x = 313,756,850.82

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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.