Home / 905,612.90-1,249,719.36-518,415.48

Finding the Fourth Proportional to 905,612.90, 1,249,719.36 and 518,415.48

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Solution

The fourth proportional to 905,612.90, 1,249,719.36 and 518,415.48 is: 715,398.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    905,612.90 : 1,249,719.36 = 518,415.48 : x
  2. Step 2: Convert to fraction form
    905,612.90/1,249,719.36 = 518,415.48/x
  3. Step 3: Cross multiply
    905,612.90x = 1,249,719.36 × 518,415.48
  4. Step 4: Simplify right side
    905,612.90x = 647,873,861,879.69
  5. Step 5: Solve for x
    x = 647,873,861,879.69/905,612.90
  6. Step 6: Final answer
    x = 715,398.23

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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.