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Finding the Fourth Proportional to 455,376.74, 628,412.58 and 251,448.71

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Solution

The fourth proportional to 455,376.74, 628,412.58 and 251,448.71 is: 346,995.17

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,376.74 : 628,412.58 = 251,448.71 : x
  2. Step 2: Convert to fraction form
    455,376.74/628,412.58 = 251,448.71/x
  3. Step 3: Cross multiply
    455,376.74x = 628,412.58 × 251,448.71
  4. Step 4: Simplify right side
    455,376.74x = 158,013,529,446.71
  5. Step 5: Solve for x
    x = 158,013,529,446.71/455,376.74
  6. Step 6: Final answer
    x = 346,995.17

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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.