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Finding the Fourth Proportional to 611,809.80, 916,818.30 and 548,629.80

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Solution

The fourth proportional to 611,809.80, 916,818.30 and 548,629.80 is: 822,140.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,809.80 : 916,818.30 = 548,629.80 : x
  2. Step 2: Convert to fraction form
    611,809.80/916,818.30 = 548,629.80/x
  3. Step 3: Cross multiply
    611,809.80x = 916,818.30 × 548,629.80
  4. Step 4: Simplify right side
    611,809.80x = 502,993,840,565.34
  5. Step 5: Solve for x
    x = 502,993,840,565.34/611,809.80
  6. Step 6: Final answer
    x = 822,140.87

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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.