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Finding the Fourth Proportional to 910.10, 1,365.17 and 545.00

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Solution

The fourth proportional to 910.10, 1,365.17 and 545.00 is: 817.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    910.10 : 1,365.17 = 545.00 : x
  2. Step 2: Convert to fraction form
    910.10/1,365.17 = 545.00/x
  3. Step 3: Cross multiply
    910.10x = 1,365.17 × 545.00
  4. Step 4: Simplify right side
    910.10x = 744,008.10
  5. Step 5: Solve for x
    x = 744,008.10/910.10
  6. Step 6: Final answer
    x = 817.50

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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.