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Finding the Fourth Proportional to 358,820,007.80, 538,230,011.70 and 358,820,007.80

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Solution

The fourth proportional to 358,820,007.80, 538,230,011.70 and 358,820,007.80 is: 538,230,011.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    358,820,007.80 : 538,230,011.70 = 358,820,007.80 : x
  2. Step 2: Convert to fraction form
    358,820,007.80/538,230,011.70 = 358,820,007.80/x
  3. Step 3: Cross multiply
    358,820,007.80x = 538,230,011.70 × 358,820,007.80
  4. Step 4: Simplify right side
    358,820,007.80x = 193,127,696,996,388,128
  5. Step 5: Solve for x
    x = 193,127,696,996,388,128/358,820,007.80
  6. Step 6: Final answer
    x = 538,230,011.70

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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.