Home / 312,278.19-431,152.02-210,455.07

Finding the Fourth Proportional to 312,278.19, 431,152.02 and 210,455.07

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Solution

The fourth proportional to 312,278.19, 431,152.02 and 210,455.07 is: 290,568.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    312,278.19 : 431,152.02 = 210,455.07 : x
  2. Step 2: Convert to fraction form
    312,278.19/431,152.02 = 210,455.07/x
  3. Step 3: Cross multiply
    312,278.19x = 431,152.02 × 210,455.07
  4. Step 4: Simplify right side
    312,278.19x = 90,738,128,549.74
  5. Step 5: Solve for x
    x = 90,738,128,549.74/312,278.19
  6. Step 6: Final answer
    x = 290,568.25

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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.