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Finding the Fourth Proportional to 426,792.24, 640,174.59 and 127,275.30

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Solution

The fourth proportional to 426,792.24, 640,174.59 and 127,275.30 is: 190,908.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    426,792.24 : 640,174.59 = 127,275.30 : x
  2. Step 2: Convert to fraction form
    426,792.24/640,174.59 = 127,275.30/x
  3. Step 3: Cross multiply
    426,792.24x = 640,174.59 × 127,275.30
  4. Step 4: Simplify right side
    426,792.24x = 81,478,412,994.63
  5. Step 5: Solve for x
    x = 81,478,412,994.63/426,792.24
  6. Step 6: Final answer
    x = 190,908.84

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.