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Finding the Fourth Proportional to 630,172.52, 945,406.70 and 387,284.28

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Solution

The fourth proportional to 630,172.52, 945,406.70 and 387,284.28 is: 581,017.33

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,172.52 : 945,406.70 = 387,284.28 : x
  2. Step 2: Convert to fraction form
    630,172.52/945,406.70 = 387,284.28/x
  3. Step 3: Cross multiply
    630,172.52x = 945,406.70 × 387,284.28
  4. Step 4: Simplify right side
    630,172.52x = 366,141,153,116.68
  5. Step 5: Solve for x
    x = 366,141,153,116.68/630,172.52
  6. Step 6: Final answer
    x = 581,017.33

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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.