Home / 661,569.58-991,435.02-345,395.80

Finding the Fourth Proportional to 661,569.58, 991,435.02 and 345,395.80

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Solution

The fourth proportional to 661,569.58, 991,435.02 and 345,395.80 is: 517,613.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,569.58 : 991,435.02 = 345,395.80 : x
  2. Step 2: Convert to fraction form
    661,569.58/991,435.02 = 345,395.80/x
  3. Step 3: Cross multiply
    661,569.58x = 991,435.02 × 345,395.80
  4. Step 4: Simplify right side
    661,569.58x = 342,437,491,880.92
  5. Step 5: Solve for x
    x = 342,437,491,880.92/661,569.58
  6. Step 6: Final answer
    x = 517,613.72

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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.