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Finding the Fourth Proportional to 909,660,643.00, 1,255,331,689.33 and 491,972,928.25

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Solution

The fourth proportional to 909,660,643.00, 1,255,331,689.33 and 491,972,928.25 is: 678,922,642.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,660,643.00 : 1,255,331,689.33 = 491,972,928.25 : x
  2. Step 2: Convert to fraction form
    909,660,643.00/1,255,331,689.33 = 491,972,928.25/x
  3. Step 3: Cross multiply
    909,660,643.00x = 1,255,331,689.33 × 491,972,928.25
  4. Step 4: Simplify right side
    909,660,643.00x = 617,589,207,122,534,656
  5. Step 5: Solve for x
    x = 617,589,207,122,534,656/909,660,643.00
  6. Step 6: Final answer
    x = 678,922,642.06

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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.