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Finding the Fourth Proportional to 675,235.47, 931,721.44 and 388,700.19

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Solution

The fourth proportional to 675,235.47, 931,721.44 and 388,700.19 is: 536,346.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    675,235.47 : 931,721.44 = 388,700.19 : x
  2. Step 2: Convert to fraction form
    675,235.47/931,721.44 = 388,700.19/x
  3. Step 3: Cross multiply
    675,235.47x = 931,721.44 × 388,700.19
  4. Step 4: Simplify right side
    675,235.47x = 362,160,300,755.07
  5. Step 5: Solve for x
    x = 362,160,300,755.07/675,235.47
  6. Step 6: Final answer
    x = 536,346.68

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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.