Home / 621,970.57-858,584.21-418,139.71

Finding the Fourth Proportional to 621,970.57, 858,584.21 and 418,139.71

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Solution

The fourth proportional to 621,970.57, 858,584.21 and 418,139.71 is: 577,210.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    621,970.57 : 858,584.21 = 418,139.71 : x
  2. Step 2: Convert to fraction form
    621,970.57/858,584.21 = 418,139.71/x
  3. Step 3: Cross multiply
    621,970.57x = 858,584.21 × 418,139.71
  4. Step 4: Simplify right side
    621,970.57x = 359,008,149,332.41
  5. Step 5: Solve for x
    x = 359,008,149,332.41/621,970.57
  6. Step 6: Final answer
    x = 577,210.84

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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.