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Finding the Fourth Proportional to 706,316,752.66, 974,709,383.42 and 388,770,209.48

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Solution

The fourth proportional to 706,316,752.66, 974,709,383.42 and 388,770,209.48 is: 536,498,631.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    706,316,752.66 : 974,709,383.42 = 388,770,209.48 : x
  2. Step 2: Convert to fraction form
    706,316,752.66/974,709,383.42 = 388,770,209.48/x
  3. Step 3: Cross multiply
    706,316,752.66x = 974,709,383.42 × 388,770,209.48
  4. Step 4: Simplify right side
    706,316,752.66x = 378,937,971,174,315,072
  5. Step 5: Solve for x
    x = 378,937,971,174,315,072/706,316,752.66
  6. Step 6: Final answer
    x = 536,498,631.45

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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.