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Finding the Fourth Proportional to 864,702.60, 1,298,511.90 and 722,401.80

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Solution

The fourth proportional to 864,702.60, 1,298,511.90 and 722,401.80 is: 1,084,820.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    864,702.60 : 1,298,511.90 = 722,401.80 : x
  2. Step 2: Convert to fraction form
    864,702.60/1,298,511.90 = 722,401.80/x
  3. Step 3: Cross multiply
    864,702.60x = 1,298,511.90 × 722,401.80
  4. Step 4: Simplify right side
    864,702.60x = 938,047,333,881.42
  5. Step 5: Solve for x
    x = 938,047,333,881.42/864,702.60
  6. Step 6: Final answer
    x = 1,084,820.76

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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.