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Finding the Fourth Proportional to 994.51, 1,490.70 and 507.60

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Solution

The fourth proportional to 994.51, 1,490.70 and 507.60 is: 760.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    994.51 : 1,490.70 = 507.60 : x
  2. Step 2: Convert to fraction form
    994.51/1,490.70 = 507.60/x
  3. Step 3: Cross multiply
    994.51x = 1,490.70 × 507.60
  4. Step 4: Simplify right side
    994.51x = 756,681.22
  5. Step 5: Solve for x
    x = 756,681.22/994.51
  6. Step 6: Final answer
    x = 760.86

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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.