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Finding the Fourth Proportional to 661,681.98, 992,621.40 and 306,731.88

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Solution

The fourth proportional to 661,681.98, 992,621.40 and 306,731.88 is: 460,143.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    661,681.98 : 992,621.40 = 306,731.88 : x
  2. Step 2: Convert to fraction form
    661,681.98/992,621.40 = 306,731.88/x
  3. Step 3: Cross multiply
    661,681.98x = 992,621.40 × 306,731.88
  4. Step 4: Simplify right side
    661,681.98x = 304,468,628,150.23
  5. Step 5: Solve for x
    x = 304,468,628,150.23/661,681.98
  6. Step 6: Final answer
    x = 460,143.45

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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.