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Finding the Fourth Proportional to 389,802.75, 537,927.80 and 210,954.75

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Solution

The fourth proportional to 389,802.75, 537,927.80 and 210,954.75 is: 291,117.56

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,802.75 : 537,927.80 = 210,954.75 : x
  2. Step 2: Convert to fraction form
    389,802.75/537,927.80 = 210,954.75/x
  3. Step 3: Cross multiply
    389,802.75x = 537,927.80 × 210,954.75
  4. Step 4: Simplify right side
    389,802.75x = 113,478,423,512.28
  5. Step 5: Solve for x
    x = 113,478,423,512.28/389,802.75
  6. Step 6: Final answer
    x = 291,117.56

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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.