Home / 385,680.08-578,503.20-105,196.40

Finding the Fourth Proportional to 385,680.08, 578,503.20 and 105,196.40

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Solution

The fourth proportional to 385,680.08, 578,503.20 and 105,196.40 is: 157,789.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,680.08 : 578,503.20 = 105,196.40 : x
  2. Step 2: Convert to fraction form
    385,680.08/578,503.20 = 105,196.40/x
  3. Step 3: Cross multiply
    385,680.08x = 578,503.20 × 105,196.40
  4. Step 4: Simplify right side
    385,680.08x = 60,856,454,028.48
  5. Step 5: Solve for x
    x = 60,856,454,028.48/385,680.08
  6. Step 6: Final answer
    x = 157,789.98

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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.