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Finding the Fourth Proportional to 389,004.64, 583,605.36 and 108,521.76

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Solution

The fourth proportional to 389,004.64, 583,605.36 and 108,521.76 is: 162,810.09

Step by Step Solution

  1. Step 1: Write the proportion equation
    389,004.64 : 583,605.36 = 108,521.76 : x
  2. Step 2: Convert to fraction form
    389,004.64/583,605.36 = 108,521.76/x
  3. Step 3: Cross multiply
    389,004.64x = 583,605.36 × 108,521.76
  4. Step 4: Simplify right side
    389,004.64x = 63,333,880,812.63
  5. Step 5: Solve for x
    x = 63,333,880,812.63/389,004.64
  6. Step 6: Final answer
    x = 162,810.09

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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.