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Finding the Fourth Proportional to 657,934,141.70, 986,901,212.55 and 528,793,978.70

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Solution

The fourth proportional to 657,934,141.70, 986,901,212.55 and 528,793,978.70 is: 793,190,968.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,934,141.70 : 986,901,212.55 = 528,793,978.70 : x
  2. Step 2: Convert to fraction form
    657,934,141.70/986,901,212.55 = 528,793,978.70/x
  3. Step 3: Cross multiply
    657,934,141.70x = 986,901,212.55 × 528,793,978.70
  4. Step 4: Simplify right side
    657,934,141.70x = 521,867,418,768,168,832
  5. Step 5: Solve for x
    x = 521,867,418,768,168,832/657,934,141.70
  6. Step 6: Final answer
    x = 793,190,968.05

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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.