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Finding the Fourth Proportional to 308,802.66, 426,050.53 and 172,815.00

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Solution

The fourth proportional to 308,802.66, 426,050.53 and 172,815.00 is: 238,430.34

Step by Step Solution

  1. Step 1: Write the proportion equation
    308,802.66 : 426,050.53 = 172,815.00 : x
  2. Step 2: Convert to fraction form
    308,802.66/426,050.53 = 172,815.00/x
  3. Step 3: Cross multiply
    308,802.66x = 426,050.53 × 172,815.00
  4. Step 4: Simplify right side
    308,802.66x = 73,627,923,623.10
  5. Step 5: Solve for x
    x = 73,627,923,623.10/308,802.66
  6. Step 6: Final answer
    x = 238,430.34

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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.