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Finding the Fourth Proportional to 907,655,485.20, 1,361,483,227.80 and 778,515,322.20

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Solution

The fourth proportional to 907,655,485.20, 1,361,483,227.80 and 778,515,322.20 is: 1,167,772,983.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,655,485.20 : 1,361,483,227.80 = 778,515,322.20 : x
  2. Step 2: Convert to fraction form
    907,655,485.20/1,361,483,227.80 = 778,515,322.20/x
  3. Step 3: Cross multiply
    907,655,485.20x = 1,361,483,227.80 × 778,515,322.20
  4. Step 4: Simplify right side
    907,655,485.20x = 1,059,935,553,760,612,992
  5. Step 5: Solve for x
    x = 1,059,935,553,760,612,992/907,655,485.20
  6. Step 6: Final answer
    x = 1,167,772,983.30

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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.