Home / 1,387,091-2,080,636.50-389,819

Finding the Fourth Proportional to 1,387,091, 2,080,636.50 and 389,819

Calculator

Solution

The fourth proportional to 1,387,091, 2,080,636.50 and 389,819 is: 584,728.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,387,091 : 2,080,636.50 = 389,819 : x
  2. Step 2: Convert to fraction form
    1,387,091/2,080,636.50 = 389,819/x
  3. Step 3: Cross multiply
    1,387,091x = 2,080,636.50 × 389,819
  4. Step 4: Simplify right side
    1,387,091x = 811,071,639,793.50
  5. Step 5: Solve for x
    x = 811,071,639,793.50/1,387,091
  6. Step 6: Final answer
    x = 584,728.50

Related Problems

Find fourth proportional to 693,545.50, 1,040,318.25 and 194,909.50
Half scale
Find fourth proportional to 2,774,182, 4,161,273 and 779,638
Double scale
Find fourth proportional to 1,387,092, 2,080,638 and 389,820
Similar ratio
Find fourth proportional to 2,080,636.50, 3,120,954.75 and 584,728.50
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.