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Finding the Fourth Proportional to 551,129.88, 760,506.70 and 309,357.04

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Solution

The fourth proportional to 551,129.88, 760,506.70 and 309,357.04 is: 426,883.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,129.88 : 760,506.70 = 309,357.04 : x
  2. Step 2: Convert to fraction form
    551,129.88/760,506.70 = 309,357.04/x
  3. Step 3: Cross multiply
    551,129.88x = 760,506.70 × 309,357.04
  4. Step 4: Simplify right side
    551,129.88x = 235,268,101,612.17
  5. Step 5: Solve for x
    x = 235,268,101,612.17/551,129.88
  6. Step 6: Final answer
    x = 426,883.23

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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.