Home / 661,322.20-991,983.30-345,875.80

Finding the Fourth Proportional to 661,322.20, 991,983.30 and 345,875.80

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Solution

The fourth proportional to 661,322.20, 991,983.30 and 345,875.80 is: 518,813.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,322.20 : 991,983.30 = 345,875.80 : x
  2. Step 2: Convert to fraction form
    661,322.20/991,983.30 = 345,875.80/x
  3. Step 3: Cross multiply
    661,322.20x = 991,983.30 × 345,875.80
  4. Step 4: Simplify right side
    661,322.20x = 343,103,017,474.14
  5. Step 5: Solve for x
    x = 343,103,017,474.14/661,322.20
  6. Step 6: Final answer
    x = 518,813.70

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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.