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Finding the Fourth Proportional to 618,607,802.88, 853,709,413.42 and 383,734,139.63

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Solution

The fourth proportional to 618,607,802.88, 853,709,413.42 and 383,734,139.63 is: 529,572,122.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,607,802.88 : 853,709,413.42 = 383,734,139.63 : x
  2. Step 2: Convert to fraction form
    618,607,802.88/853,709,413.42 = 383,734,139.63/x
  3. Step 3: Cross multiply
    618,607,802.88x = 853,709,413.42 × 383,734,139.63
  4. Step 4: Simplify right side
    618,607,802.88x = 327,597,447,248,966,784
  5. Step 5: Solve for x
    x = 327,597,447,248,966,784/618,607,802.88
  6. Step 6: Final answer
    x = 529,572,122.63

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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.