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Finding the Fourth Proportional to 690,030.72, 952,232.64 and 388,224

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Solution

The fourth proportional to 690,030.72, 952,232.64 and 388,224 is: 535,743.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    690,030.72 : 952,232.64 = 388,224 : x
  2. Step 2: Convert to fraction form
    690,030.72/952,232.64 = 388,224/x
  3. Step 3: Cross multiply
    690,030.72x = 952,232.64 × 388,224
  4. Step 4: Simplify right side
    690,030.72x = 369,679,564,431.36
  5. Step 5: Solve for x
    x = 369,679,564,431.36/690,030.72
  6. Step 6: Final answer
    x = 535,743.63

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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.