Home / 388,420,375.97-536,020,333.88-209,804,263.46

Finding the Fourth Proportional to 388,420,375.97, 536,020,333.88 and 209,804,263.46

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Solution

The fourth proportional to 388,420,375.97, 536,020,333.88 and 209,804,263.46 is: 289,529,999.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,420,375.97 : 536,020,333.88 = 209,804,263.46 : x
  2. Step 2: Convert to fraction form
    388,420,375.97/536,020,333.88 = 209,804,263.46/x
  3. Step 3: Cross multiply
    388,420,375.97x = 536,020,333.88 × 209,804,263.46
  4. Step 4: Simplify right side
    388,420,375.97x = 112,459,351,345,547,568
  5. Step 5: Solve for x
    x = 112,459,351,345,547,568/388,420,375.97
  6. Step 6: Final answer
    x = 289,529,999.72

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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.