Home / 679,943.18-938,322.54-378,137.18

Finding the Fourth Proportional to 679,943.18, 938,322.54 and 378,137.18

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Solution

The fourth proportional to 679,943.18, 938,322.54 and 378,137.18 is: 521,829.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,943.18 : 938,322.54 = 378,137.18 : x
  2. Step 2: Convert to fraction form
    679,943.18/938,322.54 = 378,137.18/x
  3. Step 3: Cross multiply
    679,943.18x = 938,322.54 × 378,137.18
  4. Step 4: Simplify right side
    679,943.18x = 354,814,639,206.04
  5. Step 5: Solve for x
    x = 354,814,639,206.04/679,943.18
  6. Step 6: Final answer
    x = 521,829.84

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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.