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Finding the Fourth Proportional to 1,393,853,978.79, 2,090,766,796.38 and 358,710,837.03

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Solution

The fourth proportional to 1,393,853,978.79, 2,090,766,796.38 and 358,710,837.03 is: 538,062,608.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,393,853,978.79 : 2,090,766,796.38 = 358,710,837.03 : x
  2. Step 2: Convert to fraction form
    1,393,853,978.79/2,090,766,796.38 = 358,710,837.03/x
  3. Step 3: Cross multiply
    1,393,853,978.79x = 2,090,766,796.38 × 358,710,837.03
  4. Step 4: Simplify right side
    1,393,853,978.79x = 749,980,707,564,001,408
  5. Step 5: Solve for x
    x = 749,980,707,564,001,408/1,393,853,978.79
  6. Step 6: Final answer
    x = 538,062,608.41

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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.