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Finding the Fourth Proportional to 675,004.19, 931,740.17 and 388,638.41

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Solution

The fourth proportional to 675,004.19, 931,740.17 and 388,638.41 is: 536,455.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,004.19 : 931,740.17 = 388,638.41 : x
  2. Step 2: Convert to fraction form
    675,004.19/931,740.17 = 388,638.41/x
  3. Step 3: Cross multiply
    675,004.19x = 931,740.17 × 388,638.41
  4. Step 4: Simplify right side
    675,004.19x = 362,110,011,600.04
  5. Step 5: Solve for x
    x = 362,110,011,600.04/675,004.19
  6. Step 6: Final answer
    x = 536,455.95

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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.