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Finding the Fourth Proportional to 385,348.97, 578,078.83 and 119,130.25

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Solution

The fourth proportional to 385,348.97, 578,078.83 and 119,130.25 is: 178,712.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,348.97 : 578,078.83 = 119,130.25 : x
  2. Step 2: Convert to fraction form
    385,348.97/578,078.83 = 119,130.25/x
  3. Step 3: Cross multiply
    385,348.97x = 578,078.83 × 119,130.25
  4. Step 4: Simplify right side
    385,348.97x = 68,866,675,537.61
  5. Step 5: Solve for x
    x = 68,866,675,537.61/385,348.97
  6. Step 6: Final answer
    x = 178,712.49

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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.