Home / 388,337,072.54-535,905,139.48-209,720,945.84

Finding the Fourth Proportional to 388,337,072.54, 535,905,139.48 and 209,720,945.84

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Solution

The fourth proportional to 388,337,072.54, 535,905,139.48 and 209,720,945.84 is: 289,414,894.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,337,072.54 : 535,905,139.48 = 209,720,945.84 : x
  2. Step 2: Convert to fraction form
    388,337,072.54/535,905,139.48 = 209,720,945.84/x
  3. Step 3: Cross multiply
    388,337,072.54x = 535,905,139.48 × 209,720,945.84
  4. Step 4: Simplify right side
    388,337,072.54x = 112,390,532,732,262,736
  5. Step 5: Solve for x
    x = 112,390,532,732,262,736/388,337,072.54
  6. Step 6: Final answer
    x = 289,414,894.12

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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.