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Finding the Fourth Proportional to 452,359.80, 678,798.90 and 172,078.20

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Solution

The fourth proportional to 452,359.80, 678,798.90 and 172,078.20 is: 258,215.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,359.80 : 678,798.90 = 172,078.20 : x
  2. Step 2: Convert to fraction form
    452,359.80/678,798.90 = 172,078.20/x
  3. Step 3: Cross multiply
    452,359.80x = 678,798.90 × 172,078.20
  4. Step 4: Simplify right side
    452,359.80x = 116,806,492,873.98
  5. Step 5: Solve for x
    x = 116,806,492,873.98/452,359.80
  6. Step 6: Final answer
    x = 258,215.90

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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.