Home / 939,420-1,296,361.80-509,683.68

Finding the Fourth Proportional to 939,420, 1,296,361.80 and 509,683.68

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Solution

The fourth proportional to 939,420, 1,296,361.80 and 509,683.68 is: 703,342.97

Step by Step Solution

  1. Step 1: Write the proportion equation
    939,420 : 1,296,361.80 = 509,683.68 : x
  2. Step 2: Convert to fraction form
    939,420/1,296,361.80 = 509,683.68/x
  3. Step 3: Cross multiply
    939,420x = 1,296,361.80 × 509,683.68
  4. Step 4: Simplify right side
    939,420x = 660,734,452,835.42
  5. Step 5: Solve for x
    x = 660,734,452,835.42/939,420
  6. Step 6: Final answer
    x = 703,342.97

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.