Home / 913,609.20-1,260,739.80-505,726.32

Finding the Fourth Proportional to 913,609.20, 1,260,739.80 and 505,726.32

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Solution

The fourth proportional to 913,609.20, 1,260,739.80 and 505,726.32 is: 697,879.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    913,609.20 : 1,260,739.80 = 505,726.32 : x
  2. Step 2: Convert to fraction form
    913,609.20/1,260,739.80 = 505,726.32/x
  3. Step 3: Cross multiply
    913,609.20x = 1,260,739.80 × 505,726.32
  4. Step 4: Simplify right side
    913,609.20x = 637,589,299,531.54
  5. Step 5: Solve for x
    x = 637,589,299,531.54/913,609.20
  6. Step 6: Final answer
    x = 697,879.68

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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.