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Finding the Fourth Proportional to 893,640.80, 1,340,461.20 and 539,746.40

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Solution

The fourth proportional to 893,640.80, 1,340,461.20 and 539,746.40 is: 809,619.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    893,640.80 : 1,340,461.20 = 539,746.40 : x
  2. Step 2: Convert to fraction form
    893,640.80/1,340,461.20 = 539,746.40/x
  3. Step 3: Cross multiply
    893,640.80x = 1,340,461.20 × 539,746.40
  4. Step 4: Simplify right side
    893,640.80x = 723,509,107,039.68
  5. Step 5: Solve for x
    x = 723,509,107,039.68/893,640.80
  6. Step 6: Final answer
    x = 809,619.60

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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.