Home / 819,712.20-1,228,256.10-538,901.40

Finding the Fourth Proportional to 819,712.20, 1,228,256.10 and 538,901.40

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Solution

The fourth proportional to 819,712.20, 1,228,256.10 and 538,901.40 is: 807,489.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    819,712.20 : 1,228,256.10 = 538,901.40 : x
  2. Step 2: Convert to fraction form
    819,712.20/1,228,256.10 = 538,901.40/x
  3. Step 3: Cross multiply
    819,712.20x = 1,228,256.10 × 538,901.40
  4. Step 4: Simplify right side
    819,712.20x = 661,908,931,848.54
  5. Step 5: Solve for x
    x = 661,908,931,848.54/819,712.20
  6. Step 6: Final answer
    x = 807,489.42

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.