Home / 641,428.58-885,111.30-383,254.11

Finding the Fourth Proportional to 641,428.58, 885,111.30 and 383,254.11

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Solution

The fourth proportional to 641,428.58, 885,111.30 and 383,254.11 is: 528,854.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    641,428.58 : 885,111.30 = 383,254.11 : x
  2. Step 2: Convert to fraction form
    641,428.58/885,111.30 = 383,254.11/x
  3. Step 3: Cross multiply
    641,428.58x = 885,111.30 × 383,254.11
  4. Step 4: Simplify right side
    641,428.58x = 339,222,543,532.44
  5. Step 5: Solve for x
    x = 339,222,543,532.44/641,428.58
  6. Step 6: Final answer
    x = 528,854.74

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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.