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Finding the Fourth Proportional to 403,779.80, 605,669.70 and 340,794.20

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Solution

The fourth proportional to 403,779.80, 605,669.70 and 340,794.20 is: 511,191.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,779.80 : 605,669.70 = 340,794.20 : x
  2. Step 2: Convert to fraction form
    403,779.80/605,669.70 = 340,794.20/x
  3. Step 3: Cross multiply
    403,779.80x = 605,669.70 × 340,794.20
  4. Step 4: Simplify right side
    403,779.80x = 206,408,720,875.74
  5. Step 5: Solve for x
    x = 206,408,720,875.74/403,779.80
  6. Step 6: Final answer
    x = 511,191.30

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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.