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Finding the Fourth Proportional to 399,670.28, 551,303.70 and 263,655.92

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Solution

The fourth proportional to 399,670.28, 551,303.70 and 263,655.92 is: 363,686.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,670.28 : 551,303.70 = 263,655.92 : x
  2. Step 2: Convert to fraction form
    399,670.28/551,303.70 = 263,655.92/x
  3. Step 3: Cross multiply
    399,670.28x = 551,303.70 × 263,655.92
  4. Step 4: Simplify right side
    399,670.28x = 145,354,484,222.90
  5. Step 5: Solve for x
    x = 145,354,484,222.90/399,670.28
  6. Step 6: Final answer
    x = 363,686.00

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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.