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Finding the Fourth Proportional to 551,088.61, 760,495.61 and 309,364.97

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Solution

The fourth proportional to 551,088.61, 760,495.61 and 309,364.97 is: 426,919.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,088.61 : 760,495.61 = 309,364.97 : x
  2. Step 2: Convert to fraction form
    551,088.61/760,495.61 = 309,364.97/x
  3. Step 3: Cross multiply
    551,088.61x = 760,495.61 × 309,364.97
  4. Step 4: Simplify right side
    551,088.61x = 235,270,701,951.42
  5. Step 5: Solve for x
    x = 235,270,701,951.42/551,088.61
  6. Step 6: Final answer
    x = 426,919.91

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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.