Home / 1,212,136.40-1,672,704.60-660,840.32

Finding the Fourth Proportional to 1,212,136.40, 1,672,704.60 and 660,840.32

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Solution

The fourth proportional to 1,212,136.40, 1,672,704.60 and 660,840.32 is: 911,935.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,212,136.40 : 1,672,704.60 = 660,840.32 : x
  2. Step 2: Convert to fraction form
    1,212,136.40/1,672,704.60 = 660,840.32/x
  3. Step 3: Cross multiply
    1,212,136.40x = 1,672,704.60 × 660,840.32
  4. Step 4: Simplify right side
    1,212,136.40x = 1,105,390,643,129.47
  5. Step 5: Solve for x
    x = 1,105,390,643,129.47/1,212,136.40
  6. Step 6: Final answer
    x = 911,935.85

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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.