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Finding the Fourth Proportional to 611,361.71, 843,640.13 and 339,429.53

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Solution

The fourth proportional to 611,361.71, 843,640.13 and 339,429.53 is: 468,391.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,361.71 : 843,640.13 = 339,429.53 : x
  2. Step 2: Convert to fraction form
    611,361.71/843,640.13 = 339,429.53/x
  3. Step 3: Cross multiply
    611,361.71x = 843,640.13 × 339,429.53
  4. Step 4: Simplify right side
    611,361.71x = 286,356,373,863.42
  5. Step 5: Solve for x
    x = 286,356,373,863.42/611,361.71
  6. Step 6: Final answer
    x = 468,391.08

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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.