Home / 385,904.90-578,857.35-136,612.10

Finding the Fourth Proportional to 385,904.90, 578,857.35 and 136,612.10

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Solution

The fourth proportional to 385,904.90, 578,857.35 and 136,612.10 is: 204,918.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,904.90 : 578,857.35 = 136,612.10 : x
  2. Step 2: Convert to fraction form
    385,904.90/578,857.35 = 136,612.10/x
  3. Step 3: Cross multiply
    385,904.90x = 578,857.35 × 136,612.10
  4. Step 4: Simplify right side
    385,904.90x = 79,078,918,183.94
  5. Step 5: Solve for x
    x = 79,078,918,183.94/385,904.90
  6. Step 6: Final answer
    x = 204,918.15

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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.