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Finding the Fourth Proportional to 528,172.47, 792,059.73 and 191,129.78

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Solution

The fourth proportional to 528,172.47, 792,059.73 and 191,129.78 is: 286,622.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,172.47 : 792,059.73 = 191,129.78 : x
  2. Step 2: Convert to fraction form
    528,172.47/792,059.73 = 191,129.78/x
  3. Step 3: Cross multiply
    528,172.47x = 792,059.73 × 191,129.78
  4. Step 4: Simplify right side
    528,172.47x = 151,386,197,981.46
  5. Step 5: Solve for x
    x = 151,386,197,981.46/528,172.47
  6. Step 6: Final answer
    x = 286,622.66

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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.