Home / 987,127.80-1,385,128.20-987,127.80

Finding the Fourth Proportional to 987,127.80, 1,385,128.20 and 987,127.80

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Solution

The fourth proportional to 987,127.80, 1,385,128.20 and 987,127.80 is: 1,385,128.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    987,127.80 : 1,385,128.20 = 987,127.80 : x
  2. Step 2: Convert to fraction form
    987,127.80/1,385,128.20 = 987,127.80/x
  3. Step 3: Cross multiply
    987,127.80x = 1,385,128.20 × 987,127.80
  4. Step 4: Simplify right side
    987,127.80x = 1,367,298,552,783.96
  5. Step 5: Solve for x
    x = 1,367,298,552,783.96/987,127.80
  6. Step 6: Final answer
    x = 1,385,128.20

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.