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Finding the Fourth Proportional to 998,280.60, 1,495,088.10 and 978,235.80

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Solution

The fourth proportional to 998,280.60, 1,495,088.10 and 978,235.80 is: 1,465,067.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    998,280.60 : 1,495,088.10 = 978,235.80 : x
  2. Step 2: Convert to fraction form
    998,280.60/1,495,088.10 = 978,235.80/x
  3. Step 3: Cross multiply
    998,280.60x = 1,495,088.10 × 978,235.80
  4. Step 4: Simplify right side
    998,280.60x = 1,462,548,703,573.98
  5. Step 5: Solve for x
    x = 1,462,548,703,573.98/998,280.60
  6. Step 6: Final answer
    x = 1,465,067.74

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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.