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Finding the Fourth Proportional to 989.63, 1,484.07 and 373.01

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Solution

The fourth proportional to 989.63, 1,484.07 and 373.01 is: 559.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    989.63 : 1,484.07 = 373.01 : x
  2. Step 2: Convert to fraction form
    989.63/1,484.07 = 373.01/x
  3. Step 3: Cross multiply
    989.63x = 1,484.07 × 373.01
  4. Step 4: Simplify right side
    989.63x = 553,566.23
  5. Step 5: Solve for x
    x = 553,566.23/989.63
  6. Step 6: Final answer
    x = 559.36

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Double scale
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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.