Home / 1,278,703.40-1,920,128.70-926,191.40

Finding the Fourth Proportional to 1,278,703.40, 1,920,128.70 and 926,191.40

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Solution

The fourth proportional to 1,278,703.40, 1,920,128.70 and 926,191.40 is: 1,390,789.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,278,703.40 : 1,920,128.70 = 926,191.40 : x
  2. Step 2: Convert to fraction form
    1,278,703.40/1,920,128.70 = 926,191.40/x
  3. Step 3: Cross multiply
    1,278,703.40x = 1,920,128.70 × 926,191.40
  4. Step 4: Simplify right side
    1,278,703.40x = 1,778,406,688,833.18
  5. Step 5: Solve for x
    x = 1,778,406,688,833.18/1,278,703.40
  6. Step 6: Final answer
    x = 1,390,789.05

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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.