Home / 641,869.64-885,807.77-355,389.73

Finding the Fourth Proportional to 641,869.64, 885,807.77 and 355,389.73

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Solution

The fourth proportional to 641,869.64, 885,807.77 and 355,389.73 is: 490,453.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,869.64 : 885,807.77 = 355,389.73 : x
  2. Step 2: Convert to fraction form
    641,869.64/885,807.77 = 355,389.73/x
  3. Step 3: Cross multiply
    641,869.64x = 885,807.77 × 355,389.73
  4. Step 4: Simplify right side
    641,869.64x = 314,806,983,219.34
  5. Step 5: Solve for x
    x = 314,806,983,219.34/641,869.64
  6. Step 6: Final answer
    x = 490,453.14

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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.