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Finding the Fourth Proportional to 658,325.21, 987,386.93 and 208,987.83

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Solution

The fourth proportional to 658,325.21, 987,386.93 and 208,987.83 is: 313,449.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,325.21 : 987,386.93 = 208,987.83 : x
  2. Step 2: Convert to fraction form
    658,325.21/987,386.93 = 208,987.83/x
  3. Step 3: Cross multiply
    658,325.21x = 987,386.93 × 208,987.83
  4. Step 4: Simplify right side
    658,325.21x = 206,351,851,609.83
  5. Step 5: Solve for x
    x = 206,351,851,609.83/658,325.21
  6. Step 6: Final answer
    x = 313,449.72

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1.5x scale

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.