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Finding the Fourth Proportional to 623,755,978.80, 934,626,198.60 and 393,312,663.60

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Solution

The fourth proportional to 623,755,978.80, 934,626,198.60 and 393,312,663.60 is: 589,333,540.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,755,978.80 : 934,626,198.60 = 393,312,663.60 : x
  2. Step 2: Convert to fraction form
    623,755,978.80/934,626,198.60 = 393,312,663.60/x
  3. Step 3: Cross multiply
    623,755,978.80x = 934,626,198.60 × 393,312,663.60
  4. Step 4: Simplify right side
    623,755,978.80x = 367,600,319,641,708,608
  5. Step 5: Solve for x
    x = 367,600,319,641,708,608/623,755,978.80
  6. Step 6: Final answer
    x = 589,333,540.90

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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.