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Finding the Fourth Proportional to 907,655,429.70, 1,361,483,144.55 and 778,515,266.70

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Solution

The fourth proportional to 907,655,429.70, 1,361,483,144.55 and 778,515,266.70 is: 1,167,772,900.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    907,655,429.70 : 1,361,483,144.55 = 778,515,266.70 : x
  2. Step 2: Convert to fraction form
    907,655,429.70/1,361,483,144.55 = 778,515,266.70/x
  3. Step 3: Cross multiply
    907,655,429.70x = 1,361,483,144.55 × 778,515,266.70
  4. Step 4: Simplify right side
    907,655,429.70x = 1,059,935,413,386,897,920
  5. Step 5: Solve for x
    x = 1,059,935,413,386,897,920/907,655,429.70
  6. Step 6: Final answer
    x = 1,167,772,900.05

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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.