Home / 657,826.21-907,815.09-386,090.11

Finding the Fourth Proportional to 657,826.21, 907,815.09 and 386,090.11

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Solution

The fourth proportional to 657,826.21, 907,815.09 and 386,090.11 is: 532,813.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,826.21 : 907,815.09 = 386,090.11 : x
  2. Step 2: Convert to fraction form
    657,826.21/907,815.09 = 386,090.11/x
  3. Step 3: Cross multiply
    657,826.21x = 907,815.09 × 386,090.11
  4. Step 4: Simplify right side
    657,826.21x = 350,498,427,957.76
  5. Step 5: Solve for x
    x = 350,498,427,957.76/657,826.21
  6. Step 6: Final answer
    x = 532,813.11

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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.