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Finding the Fourth Proportional to 897.61, 1,345.70 and 342.29

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Solution

The fourth proportional to 897.61, 1,345.70 and 342.29 is: 513.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    897.61 : 1,345.70 = 342.29 : x
  2. Step 2: Convert to fraction form
    897.61/1,345.70 = 342.29/x
  3. Step 3: Cross multiply
    897.61x = 1,345.70 × 342.29
  4. Step 4: Simplify right side
    897.61x = 460,617.94
  5. Step 5: Solve for x
    x = 460,617.94/897.61
  6. Step 6: Final answer
    x = 513.16

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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.