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Finding the Fourth Proportional to 862,802.40, 1,294,203.60 and 813,813.60

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Solution

The fourth proportional to 862,802.40, 1,294,203.60 and 813,813.60 is: 1,220,720.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    862,802.40 : 1,294,203.60 = 813,813.60 : x
  2. Step 2: Convert to fraction form
    862,802.40/1,294,203.60 = 813,813.60/x
  3. Step 3: Cross multiply
    862,802.40x = 1,294,203.60 × 813,813.60
  4. Step 4: Simplify right side
    862,802.40x = 1,053,240,490,848.96
  5. Step 5: Solve for x
    x = 1,053,240,490,848.96/862,802.40
  6. Step 6: Final answer
    x = 1,220,720.40

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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.