Home / 1,205,407.20-1,808,110.80-780,254.40

Finding the Fourth Proportional to 1,205,407.20, 1,808,110.80 and 780,254.40

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Solution

The fourth proportional to 1,205,407.20, 1,808,110.80 and 780,254.40 is: 1,170,381.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,205,407.20 : 1,808,110.80 = 780,254.40 : x
  2. Step 2: Convert to fraction form
    1,205,407.20/1,808,110.80 = 780,254.40/x
  3. Step 3: Cross multiply
    1,205,407.20x = 1,808,110.80 × 780,254.40
  4. Step 4: Simplify right side
    1,205,407.20x = 1,410,786,407,387.52
  5. Step 5: Solve for x
    x = 1,410,786,407,387.52/1,205,407.20
  6. Step 6: Final answer
    x = 1,170,381.60

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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.