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Finding the Fourth Proportional to 673,840,920.80, 1,009,965,118.80 and 285,663,000.80

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Solution

The fourth proportional to 673,840,920.80, 1,009,965,118.80 and 285,663,000.80 is: 428,156,939.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    673,840,920.80 : 1,009,965,118.80 = 285,663,000.80 : x
  2. Step 2: Convert to fraction form
    673,840,920.80/1,009,965,118.80 = 285,663,000.80/x
  3. Step 3: Cross multiply
    673,840,920.80x = 1,009,965,118.80 × 285,663,000.80
  4. Step 4: Simplify right side
    673,840,920.80x = 288,509,666,539,736,512
  5. Step 5: Solve for x
    x = 288,509,666,539,736,512/673,840,920.80
  6. Step 6: Final answer
    x = 428,156,939.77

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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.