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Finding the Fourth Proportional to 872,830.80, 1,306,913.40 and 872,830.80

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Solution

The fourth proportional to 872,830.80, 1,306,913.40 and 872,830.80 is: 1,306,913.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    872,830.80 : 1,306,913.40 = 872,830.80 : x
  2. Step 2: Convert to fraction form
    872,830.80/1,306,913.40 = 872,830.80/x
  3. Step 3: Cross multiply
    872,830.80x = 1,306,913.40 × 872,830.80
  4. Step 4: Simplify right side
    872,830.80x = 1,140,714,268,452.72
  5. Step 5: Solve for x
    x = 1,140,714,268,452.72/872,830.80
  6. Step 6: Final answer
    x = 1,306,913.40

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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.