Home / 857,434.80-1,285,822.68-407,809.20

Finding the Fourth Proportional to 857,434.80, 1,285,822.68 and 407,809.20

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Solution

The fourth proportional to 857,434.80, 1,285,822.68 and 407,809.20 is: 611,557.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,434.80 : 1,285,822.68 = 407,809.20 : x
  2. Step 2: Convert to fraction form
    857,434.80/1,285,822.68 = 407,809.20/x
  3. Step 3: Cross multiply
    857,434.80x = 1,285,822.68 × 407,809.20
  4. Step 4: Simplify right side
    857,434.80x = 524,370,318,472.66
  5. Step 5: Solve for x
    x = 524,370,318,472.66/857,434.80
  6. Step 6: Final answer
    x = 611,557.08

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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.