Home / 385,816.13-578,780.57-185,972.18

Finding the Fourth Proportional to 385,816.13, 578,780.57 and 185,972.18

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Solution

The fourth proportional to 385,816.13, 578,780.57 and 185,972.18 is: 278,985.44

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,816.13 : 578,780.57 = 185,972.18 : x
  2. Step 2: Convert to fraction form
    385,816.13/578,780.57 = 185,972.18/x
  3. Step 3: Cross multiply
    385,816.13x = 578,780.57 × 185,972.18
  4. Step 4: Simplify right side
    385,816.13x = 107,637,081,915.57
  5. Step 5: Solve for x
    x = 107,637,081,915.57/385,816.13
  6. Step 6: Final answer
    x = 278,985.44

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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.