Home / 385,913.40-578,870.10-136,620.60

Finding the Fourth Proportional to 385,913.40, 578,870.10 and 136,620.60

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Solution

The fourth proportional to 385,913.40, 578,870.10 and 136,620.60 is: 204,930.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,913.40 : 578,870.10 = 136,620.60 : x
  2. Step 2: Convert to fraction form
    385,913.40/578,870.10 = 136,620.60/x
  3. Step 3: Cross multiply
    385,913.40x = 578,870.10 × 136,620.60
  4. Step 4: Simplify right side
    385,913.40x = 79,085,580,384.06
  5. Step 5: Solve for x
    x = 79,085,580,384.06/385,913.40
  6. Step 6: Final answer
    x = 204,930.90

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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.