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Finding the Fourth Proportional to 391,743.36, 540,325.88 and 359,580.16

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Solution

The fourth proportional to 391,743.36, 540,325.88 and 359,580.16 is: 495,963.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    391,743.36 : 540,325.88 = 359,580.16 : x
  2. Step 2: Convert to fraction form
    391,743.36/540,325.88 = 359,580.16/x
  3. Step 3: Cross multiply
    391,743.36x = 540,325.88 × 359,580.16
  4. Step 4: Simplify right side
    391,743.36x = 194,290,466,382.54
  5. Step 5: Solve for x
    x = 194,290,466,382.54/391,743.36
  6. Step 6: Final answer
    x = 495,963.65

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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.