Home / 426,015.20-638,779.80-159,784.40

Finding the Fourth Proportional to 426,015.20, 638,779.80 and 159,784.40

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Solution

The fourth proportional to 426,015.20, 638,779.80 and 159,784.40 is: 239,585.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,015.20 : 638,779.80 = 159,784.40 : x
  2. Step 2: Convert to fraction form
    426,015.20/638,779.80 = 159,784.40/x
  3. Step 3: Cross multiply
    426,015.20x = 638,779.80 × 159,784.40
  4. Step 4: Simplify right side
    426,015.20x = 102,067,047,075.12
  5. Step 5: Solve for x
    x = 102,067,047,075.12/426,015.20
  6. Step 6: Final answer
    x = 239,585.46

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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.