Home / 1,258,979.20-1,888,468.80-1,209,990.40

Finding the Fourth Proportional to 1,258,979.20, 1,888,468.80 and 1,209,990.40

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Solution

The fourth proportional to 1,258,979.20, 1,888,468.80 and 1,209,990.40 is: 1,814,985.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,258,979.20 : 1,888,468.80 = 1,209,990.40 : x
  2. Step 2: Convert to fraction form
    1,258,979.20/1,888,468.80 = 1,209,990.40/x
  3. Step 3: Cross multiply
    1,258,979.20x = 1,888,468.80 × 1,209,990.40
  4. Step 4: Simplify right side
    1,258,979.20x = 2,285,029,118,699.52
  5. Step 5: Solve for x
    x = 2,285,029,118,699.52/1,258,979.20
  6. Step 6: Final answer
    x = 1,814,985.60

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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.