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Finding the Fourth Proportional to 399,776.16, 551,637.95 and 256,729.97

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Solution

The fourth proportional to 399,776.16, 551,637.95 and 256,729.97 is: 354,253.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,776.16 : 551,637.95 = 256,729.97 : x
  2. Step 2: Convert to fraction form
    399,776.16/551,637.95 = 256,729.97/x
  3. Step 3: Cross multiply
    399,776.16x = 551,637.95 × 256,729.97
  4. Step 4: Simplify right side
    399,776.16x = 141,621,990,312.52
  5. Step 5: Solve for x
    x = 141,621,990,312.52/399,776.16
  6. Step 6: Final answer
    x = 354,253.22

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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.