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Finding the Fourth Proportional to 551,333.12, 760,640.64 and 312,730.88

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Solution

The fourth proportional to 551,333.12, 760,640.64 and 312,730.88 is: 431,455.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,333.12 : 760,640.64 = 312,730.88 : x
  2. Step 2: Convert to fraction form
    551,333.12/760,640.64 = 312,730.88/x
  3. Step 3: Cross multiply
    551,333.12x = 760,640.64 × 312,730.88
  4. Step 4: Simplify right side
    551,333.12x = 237,875,816,710.96
  5. Step 5: Solve for x
    x = 237,875,816,710.96/551,333.12
  6. Step 6: Final answer
    x = 431,455.70

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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.