Home / 1,187,989,141.46-1,639,507,878.09-785,403,432.52

Finding the Fourth Proportional to 1,187,989,141.46, 1,639,507,878.09 and 785,403,432.52

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Solution

The fourth proportional to 1,187,989,141.46, 1,639,507,878.09 and 785,403,432.52 is: 1,083,911,519.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,187,989,141.46 : 1,639,507,878.09 = 785,403,432.52 : x
  2. Step 2: Convert to fraction form
    1,187,989,141.46/1,639,507,878.09 = 785,403,432.52/x
  3. Step 3: Cross multiply
    1,187,989,141.46x = 1,639,507,878.09 × 785,403,432.52
  4. Step 4: Simplify right side
    1,187,989,141.46x = 1,287,675,115,083,343,104
  5. Step 5: Solve for x
    x = 1,287,675,115,083,343,104/1,187,989,141.46
  6. Step 6: Final answer
    x = 1,083,911,519.18

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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.