Home / 385,411.53-578,133.09-104,928.78

Finding the Fourth Proportional to 385,411.53, 578,133.09 and 104,928.78

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Solution

The fourth proportional to 385,411.53, 578,133.09 and 104,928.78 is: 157,397.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,411.53 : 578,133.09 = 104,928.78 : x
  2. Step 2: Convert to fraction form
    385,411.53/578,133.09 = 104,928.78/x
  3. Step 3: Cross multiply
    385,411.53x = 578,133.09 × 104,928.78
  4. Step 4: Simplify right side
    385,411.53x = 60,662,799,811.33
  5. Step 5: Solve for x
    x = 60,662,799,811.33/385,411.53
  6. Step 6: Final answer
    x = 157,397.47

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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.