Home / 621,971.73-858,438.45-389,506.68

Finding the Fourth Proportional to 621,971.73, 858,438.45 and 389,506.68

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Solution

The fourth proportional to 621,971.73, 858,438.45 and 389,506.68 is: 537,592.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,971.73 : 858,438.45 = 389,506.68 : x
  2. Step 2: Convert to fraction form
    621,971.73/858,438.45 = 389,506.68/x
  3. Step 3: Cross multiply
    621,971.73x = 858,438.45 × 389,506.68
  4. Step 4: Simplify right side
    621,971.73x = 334,367,510,643.85
  5. Step 5: Solve for x
    x = 334,367,510,643.85/621,971.73
  6. Step 6: Final answer
    x = 537,592.78

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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.