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Finding the Fourth Proportional to 611,433.60, 917,150.40 and 387,484.80

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Solution

The fourth proportional to 611,433.60, 917,150.40 and 387,484.80 is: 581,227.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    611,433.60 : 917,150.40 = 387,484.80 : x
  2. Step 2: Convert to fraction form
    611,433.60/917,150.40 = 387,484.80/x
  3. Step 3: Cross multiply
    611,433.60x = 917,150.40 × 387,484.80
  4. Step 4: Simplify right side
    611,433.60x = 355,381,839,313.92
  5. Step 5: Solve for x
    x = 355,381,839,313.92/611,433.60
  6. Step 6: Final answer
    x = 581,227.20

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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.