Home / 385,845.60-578,768.40-133,125.60

Finding the Fourth Proportional to 385,845.60, 578,768.40 and 133,125.60

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Solution

The fourth proportional to 385,845.60, 578,768.40 and 133,125.60 is: 199,688.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,845.60 : 578,768.40 = 133,125.60 : x
  2. Step 2: Convert to fraction form
    385,845.60/578,768.40 = 133,125.60/x
  3. Step 3: Cross multiply
    385,845.60x = 578,768.40 × 133,125.60
  4. Step 4: Simplify right side
    385,845.60x = 77,048,890,511.04
  5. Step 5: Solve for x
    x = 77,048,890,511.04/385,845.60
  6. Step 6: Final answer
    x = 199,688.40

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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.