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Finding the Fourth Proportional to 388,973,806.01, 536,785,469.55 and 210,357,694.32

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Solution

The fourth proportional to 388,973,806.01, 536,785,469.55 and 210,357,694.32 is: 290,294,492.78

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,973,806.01 : 536,785,469.55 = 210,357,694.32 : x
  2. Step 2: Convert to fraction form
    388,973,806.01/536,785,469.55 = 210,357,694.32/x
  3. Step 3: Cross multiply
    388,973,806.01x = 536,785,469.55 × 210,357,694.32
  4. Step 4: Simplify right side
    388,973,806.01x = 112,916,953,717,964,784
  5. Step 5: Solve for x
    x = 112,916,953,717,964,784/388,973,806.01
  6. Step 6: Final answer
    x = 290,294,492.78

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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.