Home / 1,390,493.80-2,085,740.70-988,960.60

Finding the Fourth Proportional to 1,390,493.80, 2,085,740.70 and 988,960.60

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Solution

The fourth proportional to 1,390,493.80, 2,085,740.70 and 988,960.60 is: 1,483,440.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,390,493.80 : 2,085,740.70 = 988,960.60 : x
  2. Step 2: Convert to fraction form
    1,390,493.80/2,085,740.70 = 988,960.60/x
  3. Step 3: Cross multiply
    1,390,493.80x = 2,085,740.70 × 988,960.60
  4. Step 4: Simplify right side
    1,390,493.80x = 2,062,715,374,116.42
  5. Step 5: Solve for x
    x = 2,062,715,374,116.42/1,390,493.80
  6. Step 6: Final answer
    x = 1,483,440.90

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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.