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Finding the Fourth Proportional to 899.61, 1,349.70 and 555.15

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Solution

The fourth proportional to 899.61, 1,349.70 and 555.15 is: 832.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    899.61 : 1,349.70 = 555.15 : x
  2. Step 2: Convert to fraction form
    899.61/1,349.70 = 555.15/x
  3. Step 3: Cross multiply
    899.61x = 1,349.70 × 555.15
  4. Step 4: Simplify right side
    899.61x = 749,285.96
  5. Step 5: Solve for x
    x = 749,285.96/899.61
  6. Step 6: Final answer
    x = 832.90

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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.