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Finding the Fourth Proportional to 452,362.80, 678,803.40 and 172,081.20

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Solution

The fourth proportional to 452,362.80, 678,803.40 and 172,081.20 is: 258,220.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    452,362.80 : 678,803.40 = 172,081.20 : x
  2. Step 2: Convert to fraction form
    452,362.80/678,803.40 = 172,081.20/x
  3. Step 3: Cross multiply
    452,362.80x = 678,803.40 × 172,081.20
  4. Step 4: Simplify right side
    452,362.80x = 116,809,303,636.08
  5. Step 5: Solve for x
    x = 116,809,303,636.08/452,362.80
  6. Step 6: Final answer
    x = 258,220.40

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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.