Home / 1,285,113.40-1,927,086.90-486,129.40

Finding the Fourth Proportional to 1,285,113.40, 1,927,086.90 and 486,129.40

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Solution

The fourth proportional to 1,285,113.40, 1,927,086.90 and 486,129.40 is: 728,973.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,285,113.40 : 1,927,086.90 = 486,129.40 : x
  2. Step 2: Convert to fraction form
    1,285,113.40/1,927,086.90 = 486,129.40/x
  3. Step 3: Cross multiply
    1,285,113.40x = 1,927,086.90 × 486,129.40
  4. Step 4: Simplify right side
    1,285,113.40x = 936,813,598,444.86
  5. Step 5: Solve for x
    x = 936,813,598,444.86/1,285,113.40
  6. Step 6: Final answer
    x = 728,973.49

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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.