Home / 315,528.36-435,426.86-172,288.28

Finding the Fourth Proportional to 315,528.36, 435,426.86 and 172,288.28

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Solution

The fourth proportional to 315,528.36, 435,426.86 and 172,288.28 is: 237,756.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,528.36 : 435,426.86 = 172,288.28 : x
  2. Step 2: Convert to fraction form
    315,528.36/435,426.86 = 172,288.28/x
  3. Step 3: Cross multiply
    315,528.36x = 435,426.86 × 172,288.28
  4. Step 4: Simplify right side
    315,528.36x = 75,018,944,775.20
  5. Step 5: Solve for x
    x = 75,018,944,775.20/315,528.36
  6. Step 6: Final answer
    x = 237,756.58

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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.