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Finding the Fourth Proportional to 300,280.70, 450,491.12 and 87,053.06

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Solution

The fourth proportional to 300,280.70, 450,491.12 and 87,053.06 is: 130,599.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    300,280.70 : 450,491.12 = 87,053.06 : x
  2. Step 2: Convert to fraction form
    300,280.70/450,491.12 = 87,053.06/x
  3. Step 3: Cross multiply
    300,280.70x = 450,491.12 × 87,053.06
  4. Step 4: Simplify right side
    300,280.70x = 39,216,631,516.24
  5. Step 5: Solve for x
    x = 39,216,631,516.24/300,280.70
  6. Step 6: Final answer
    x = 130,599.91

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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.