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Finding the Fourth Proportional to 393,995, 590,992.50 and 98,507

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Solution

The fourth proportional to 393,995, 590,992.50 and 98,507 is: 147,760.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    393,995 : 590,992.50 = 98,507 : x
  2. Step 2: Convert to fraction form
    393,995/590,992.50 = 98,507/x
  3. Step 3: Cross multiply
    393,995x = 590,992.50 × 98,507
  4. Step 4: Simplify right side
    393,995x = 58,216,898,197.50
  5. Step 5: Solve for x
    x = 58,216,898,197.50/393,995
  6. Step 6: Final answer
    x = 147,760.50

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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.