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Finding the Fourth Proportional to 388,640,854.96, 583,063,486.80 and 139,671,244.24

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Solution

The fourth proportional to 388,640,854.96, 583,063,486.80 and 139,671,244.24 is: 209,543,596.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,640,854.96 : 583,063,486.80 = 139,671,244.24 : x
  2. Step 2: Convert to fraction form
    388,640,854.96/583,063,486.80 = 139,671,244.24/x
  3. Step 3: Cross multiply
    388,640,854.96x = 583,063,486.80 × 139,671,244.24
  4. Step 4: Simplify right side
    388,640,854.96x = 81,437,202,672,268,816
  5. Step 5: Solve for x
    x = 81,437,202,672,268,816/388,640,854.96
  6. Step 6: Final answer
    x = 209,543,596.96

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.