Home / 909,660,643.26-1,255,331,689.67-491,972,928.50

Finding the Fourth Proportional to 909,660,643.26, 1,255,331,689.67 and 491,972,928.50

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Solution

The fourth proportional to 909,660,643.26, 1,255,331,689.67 and 491,972,928.50 is: 678,922,642.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    909,660,643.26 : 1,255,331,689.67 = 491,972,928.50 : x
  2. Step 2: Convert to fraction form
    909,660,643.26/1,255,331,689.67 = 491,972,928.50/x
  3. Step 3: Cross multiply
    909,660,643.26x = 1,255,331,689.67 × 491,972,928.50
  4. Step 4: Simplify right side
    909,660,643.26x = 617,589,207,605,803,136
  5. Step 5: Solve for x
    x = 617,589,207,605,803,136/909,660,643.26
  6. Step 6: Final answer
    x = 678,922,642.40

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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.