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Finding the Fourth Proportional to 638,396.65, 880,970.73 and 348,013.94

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Solution

The fourth proportional to 638,396.65, 880,970.73 and 348,013.94 is: 480,250.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,396.65 : 880,970.73 = 348,013.94 : x
  2. Step 2: Convert to fraction form
    638,396.65/880,970.73 = 348,013.94/x
  3. Step 3: Cross multiply
    638,396.65x = 880,970.73 × 348,013.94
  4. Step 4: Simplify right side
    638,396.65x = 306,590,094,771.98
  5. Step 5: Solve for x
    x = 306,590,094,771.98/638,396.65
  6. Step 6: Final answer
    x = 480,250.17

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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.