Home / 315,480.09-435,360.28-172,240.13

Finding the Fourth Proportional to 315,480.09, 435,360.28 and 172,240.13

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Solution

The fourth proportional to 315,480.09, 435,360.28 and 172,240.13 is: 237,690.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    315,480.09 : 435,360.28 = 172,240.13 : x
  2. Step 2: Convert to fraction form
    315,480.09/435,360.28 = 172,240.13/x
  3. Step 3: Cross multiply
    315,480.09x = 435,360.28 × 172,240.13
  4. Step 4: Simplify right side
    315,480.09x = 74,986,510,495.91
  5. Step 5: Solve for x
    x = 74,986,510,495.91/315,480.09
  6. Step 6: Final answer
    x = 237,690.15

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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.