Home / 399,828.48-551,710-256,782.28

Finding the Fourth Proportional to 399,828.48, 551,710 and 256,782.28

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Solution

The fourth proportional to 399,828.48, 551,710 and 256,782.28 is: 354,325.31

Step by Step Solution

  1. Step 1: Write the proportion equation
    399,828.48 : 551,710 = 256,782.28 : x
  2. Step 2: Convert to fraction form
    399,828.48/551,710 = 256,782.28/x
  3. Step 3: Cross multiply
    399,828.48x = 551,710 × 256,782.28
  4. Step 4: Simplify right side
    399,828.48x = 141,669,351,698.80
  5. Step 5: Solve for x
    x = 141,669,351,698.80/399,828.48
  6. Step 6: Final answer
    x = 354,325.31

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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.