Home / 386,251,720.85-533,041,391.59-221,271,176.81

Finding the Fourth Proportional to 386,251,720.85, 533,041,391.59 and 221,271,176.81

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Solution

The fourth proportional to 386,251,720.85, 533,041,391.59 and 221,271,176.81 is: 305,362,253.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    386,251,720.85 : 533,041,391.59 = 221,271,176.81 : x
  2. Step 2: Convert to fraction form
    386,251,720.85/533,041,391.59 = 221,271,176.81/x
  3. Step 3: Cross multiply
    386,251,720.85x = 533,041,391.59 × 221,271,176.81
  4. Step 4: Simplify right side
    386,251,720.85x = 117,946,696,006,338,752
  5. Step 5: Solve for x
    x = 117,946,696,006,338,752/386,251,720.85
  6. Step 6: Final answer
    x = 305,362,253.78

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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.