Home / 857,144.74-1,285,787.07-430,461.12

Finding the Fourth Proportional to 857,144.74, 1,285,787.07 and 430,461.12

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Solution

The fourth proportional to 857,144.74, 1,285,787.07 and 430,461.12 is: 645,726.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    857,144.74 : 1,285,787.07 = 430,461.12 : x
  2. Step 2: Convert to fraction form
    857,144.74/1,285,787.07 = 430,461.12/x
  3. Step 3: Cross multiply
    857,144.74x = 1,285,787.07 × 430,461.12
  4. Step 4: Simplify right side
    857,144.74x = 553,481,346,457.95
  5. Step 5: Solve for x
    x = 553,481,346,457.95/857,144.74
  6. Step 6: Final answer
    x = 645,726.82

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Double scale
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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.