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Finding the Fourth Proportional to 391,332.16, 540,122.86 and 238,420.36

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Solution

The fourth proportional to 391,332.16, 540,122.86 and 238,420.36 is: 329,071.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,332.16 : 540,122.86 = 238,420.36 : x
  2. Step 2: Convert to fraction form
    391,332.16/540,122.86 = 238,420.36/x
  3. Step 3: Cross multiply
    391,332.16x = 540,122.86 × 238,420.36
  4. Step 4: Simplify right side
    391,332.16x = 128,776,286,725.43
  5. Step 5: Solve for x
    x = 128,776,286,725.43/391,332.16
  6. Step 6: Final answer
    x = 329,071.57

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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.