Home / 621,972.73-858,439.83-389,507.68

Finding the Fourth Proportional to 621,972.73, 858,439.83 and 389,507.68

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Solution

The fourth proportional to 621,972.73, 858,439.83 and 389,507.68 is: 537,594.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,972.73 : 858,439.83 = 389,507.68 : x
  2. Step 2: Convert to fraction form
    621,972.73/858,439.83 = 389,507.68/x
  3. Step 3: Cross multiply
    621,972.73x = 858,439.83 × 389,507.68
  4. Step 4: Simplify right side
    621,972.73x = 334,368,906,602.89
  5. Step 5: Solve for x
    x = 334,368,906,602.89/621,972.73
  6. Step 6: Final answer
    x = 537,594.16

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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.