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Finding the Fourth Proportional to 897.75, 1,345.48 and 429.44

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Solution

The fourth proportional to 897.75, 1,345.48 and 429.44 is: 643.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.75 : 1,345.48 = 429.44 : x
  2. Step 2: Convert to fraction form
    897.75/1,345.48 = 429.44/x
  3. Step 3: Cross multiply
    897.75x = 1,345.48 × 429.44
  4. Step 4: Simplify right side
    897.75x = 577,795.13
  5. Step 5: Solve for x
    x = 577,795.13/897.75
  6. Step 6: Final answer
    x = 643.60

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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.