Home / 288,387,954.72-398,503,284.54-209,935,305.72

Finding the Fourth Proportional to 288,387,954.72, 398,503,284.54 and 209,935,305.72

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Solution

The fourth proportional to 288,387,954.72, 398,503,284.54 and 209,935,305.72 is: 290,095,017.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    288,387,954.72 : 398,503,284.54 = 209,935,305.72 : x
  2. Step 2: Convert to fraction form
    288,387,954.72/398,503,284.54 = 209,935,305.72/x
  3. Step 3: Cross multiply
    288,387,954.72x = 398,503,284.54 × 209,935,305.72
  4. Step 4: Simplify right side
    288,387,954.72x = 83,659,908,870,329,056
  5. Step 5: Solve for x
    x = 83,659,908,870,329,056/288,387,954.72
  6. Step 6: Final answer
    x = 290,095,017.84

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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.