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Finding the Fourth Proportional to 649,938,863.79, 896,915,632 and 371,486,366.03

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Solution

The fourth proportional to 649,938,863.79, 896,915,632 and 371,486,366.03 is: 512,651,185.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    649,938,863.79 : 896,915,632 = 371,486,366.03 : x
  2. Step 2: Convert to fraction form
    649,938,863.79/896,915,632 = 371,486,366.03/x
  3. Step 3: Cross multiply
    649,938,863.79x = 896,915,632 × 371,486,366.03
  4. Step 4: Simplify right side
    649,938,863.79x = 333,191,928,767,180,736
  5. Step 5: Solve for x
    x = 333,191,928,767,180,736/649,938,863.79
  6. Step 6: Final answer
    x = 512,651,185.10

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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.