Home / 393,288.11-542,779.21-240,415.80

Finding the Fourth Proportional to 393,288.11, 542,779.21 and 240,415.80

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Solution

The fourth proportional to 393,288.11, 542,779.21 and 240,415.80 is: 331,799.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,288.11 : 542,779.21 = 240,415.80 : x
  2. Step 2: Convert to fraction form
    393,288.11/542,779.21 = 240,415.80/x
  3. Step 3: Cross multiply
    393,288.11x = 542,779.21 × 240,415.80
  4. Step 4: Simplify right side
    393,288.11x = 130,492,697,995.52
  5. Step 5: Solve for x
    x = 130,492,697,995.52/393,288.11
  6. Step 6: Final answer
    x = 331,799.25

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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.