Home / 878,929,055.74-1,212,370,382.58-521,443,738.72

Finding the Fourth Proportional to 878,929,055.74, 1,212,370,382.58 and 521,443,738.72

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Solution

The fourth proportional to 878,929,055.74, 1,212,370,382.58 and 521,443,738.72 is: 719,265,042.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    878,929,055.74 : 1,212,370,382.58 = 521,443,738.72 : x
  2. Step 2: Convert to fraction form
    878,929,055.74/1,212,370,382.58 = 521,443,738.72/x
  3. Step 3: Cross multiply
    878,929,055.74x = 1,212,370,382.58 × 521,443,738.72
  4. Step 4: Simplify right side
    878,929,055.74x = 632,182,945,005,911,936
  5. Step 5: Solve for x
    x = 632,182,945,005,911,936/878,929,055.74
  6. Step 6: Final answer
    x = 719,265,042.93

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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.