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Finding the Fourth Proportional to 554,578,813.79, 765,342,677.78 and 307,060,189.91

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Solution

The fourth proportional to 554,578,813.79, 765,342,677.78 and 307,060,189.91 is: 423,756,303.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,578,813.79 : 765,342,677.78 = 307,060,189.91 : x
  2. Step 2: Convert to fraction form
    554,578,813.79/765,342,677.78 = 307,060,189.91/x
  3. Step 3: Cross multiply
    554,578,813.79x = 765,342,677.78 × 307,060,189.91
  4. Step 4: Simplify right side
    554,578,813.79x = 235,006,267,979,992,704
  5. Step 5: Solve for x
    x = 235,006,267,979,992,704/554,578,813.79
  6. Step 6: Final answer
    x = 423,756,303.23

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.