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Finding the Fourth Proportional to 287,388,928.30, 431,083,392.45 and 287,388,928.30

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Solution

The fourth proportional to 287,388,928.30, 431,083,392.45 and 287,388,928.30 is: 431,083,392.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,388,928.30 : 431,083,392.45 = 287,388,928.30 : x
  2. Step 2: Convert to fraction form
    287,388,928.30/431,083,392.45 = 287,388,928.30/x
  3. Step 3: Cross multiply
    287,388,928.30x = 431,083,392.45 × 287,388,928.30
  4. Step 4: Simplify right side
    287,388,928.30x = 123,888,594,164,133,808
  5. Step 5: Solve for x
    x = 123,888,594,164,133,808/287,388,928.30
  6. Step 6: Final answer
    x = 431,083,392.45

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.