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Finding the Fourth Proportional to 392,303.20, 539,679.48 and 343,686.16

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Solution

The fourth proportional to 392,303.20, 539,679.48 and 343,686.16 is: 472,798.51

Step by Step Solution

  1. Step 1: Write the proportion equation
    392,303.20 : 539,679.48 = 343,686.16 : x
  2. Step 2: Convert to fraction form
    392,303.20/539,679.48 = 343,686.16/x
  3. Step 3: Cross multiply
    392,303.20x = 539,679.48 × 343,686.16
  4. Step 4: Simplify right side
    392,303.20x = 185,480,368,112.00
  5. Step 5: Solve for x
    x = 185,480,368,112.00/392,303.20
  6. Step 6: Final answer
    x = 472,798.51

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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.