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Finding the Fourth Proportional to 453,043.80, 678,788.10 and 215,875.80

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Solution

The fourth proportional to 453,043.80, 678,788.10 and 215,875.80 is: 323,443.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    453,043.80 : 678,788.10 = 215,875.80 : x
  2. Step 2: Convert to fraction form
    453,043.80/678,788.10 = 215,875.80/x
  3. Step 3: Cross multiply
    453,043.80x = 678,788.10 × 215,875.80
  4. Step 4: Simplify right side
    453,043.80x = 146,533,924,117.98
  5. Step 5: Solve for x
    x = 146,533,924,117.98/453,043.80
  6. Step 6: Final answer
    x = 323,443.17

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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.