Home / 1,272,629,878.79-1,909,219,581.32-387,384,461.91

Finding the Fourth Proportional to 1,272,629,878.79, 1,909,219,581.32 and 387,384,461.91

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Solution

The fourth proportional to 1,272,629,878.79, 1,909,219,581.32 and 387,384,461.91 is: 581,160,329.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,272,629,878.79 : 1,909,219,581.32 = 387,384,461.91 : x
  2. Step 2: Convert to fraction form
    1,272,629,878.79/1,909,219,581.32 = 387,384,461.91/x
  3. Step 3: Cross multiply
    1,272,629,878.79x = 1,909,219,581.32 × 387,384,461.91
  4. Step 4: Simplify right side
    1,272,629,878.79x = 739,602,000,188,820,224
  5. Step 5: Solve for x
    x = 739,602,000,188,820,224/1,272,629,878.79
  6. Step 6: Final answer
    x = 581,160,329.89

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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.