Home / 390,779.88-539,276.23-221,010.36

Finding the Fourth Proportional to 390,779.88, 539,276.23 and 221,010.36

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Solution

The fourth proportional to 390,779.88, 539,276.23 and 221,010.36 is: 304,994.29

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,779.88 : 539,276.23 = 221,010.36 : x
  2. Step 2: Convert to fraction form
    390,779.88/539,276.23 = 221,010.36/x
  3. Step 3: Cross multiply
    390,779.88x = 539,276.23 × 221,010.36
  4. Step 4: Simplify right side
    390,779.88x = 119,185,633,731.74
  5. Step 5: Solve for x
    x = 119,185,633,731.74/390,779.88
  6. Step 6: Final answer
    x = 304,994.29

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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.