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Finding the Fourth Proportional to 551,904, 761,628.24 and 313,440

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Solution

The fourth proportional to 551,904, 761,628.24 and 313,440 is: 432,547.61

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,904 : 761,628.24 = 313,440 : x
  2. Step 2: Convert to fraction form
    551,904/761,628.24 = 313,440/x
  3. Step 3: Cross multiply
    551,904x = 761,628.24 × 313,440
  4. Step 4: Simplify right side
    551,904x = 238,724,755,545.60
  5. Step 5: Solve for x
    x = 238,724,755,545.60/551,904
  6. Step 6: Final answer
    x = 432,547.61

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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.