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Finding the Fourth Proportional to 554,807,939.15, 765,647,327.59 and 316,648,346.69

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Solution

The fourth proportional to 554,807,939.15, 765,647,327.59 and 316,648,346.69 is: 436,981,779.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    554,807,939.15 : 765,647,327.59 = 316,648,346.69 : x
  2. Step 2: Convert to fraction form
    554,807,939.15/765,647,327.59 = 316,648,346.69/x
  3. Step 3: Cross multiply
    554,807,939.15x = 765,647,327.59 × 316,648,346.69
  4. Step 4: Simplify right side
    554,807,939.15x = 242,440,960,424,370,464
  5. Step 5: Solve for x
    x = 242,440,960,424,370,464/554,807,939.15
  6. Step 6: Final answer
    x = 436,981,779.31

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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.