Home / 1,287,443,136.16-1,928,349,142.53-912,815,455.73

Finding the Fourth Proportional to 1,287,443,136.16, 1,928,349,142.53 and 912,815,455.73

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Solution

The fourth proportional to 1,287,443,136.16, 1,928,349,142.53 and 912,815,455.73 is: 1,367,226,910.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,287,443,136.16 : 1,928,349,142.53 = 912,815,455.73 : x
  2. Step 2: Convert to fraction form
    1,287,443,136.16/1,928,349,142.53 = 912,815,455.73/x
  3. Step 3: Cross multiply
    1,287,443,136.16x = 1,928,349,142.53 × 912,815,455.73
  4. Step 4: Simplify right side
    1,287,443,136.16x = 1,760,226,901,346,134,784
  5. Step 5: Solve for x
    x = 1,760,226,901,346,134,784/1,287,443,136.16
  6. Step 6: Final answer
    x = 1,367,226,910.39

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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.