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Finding the Fourth Proportional to 1,031.58, 1,547.87 and 545.00

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Solution

The fourth proportional to 1,031.58, 1,547.87 and 545.00 is: 817.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,031.58 : 1,547.87 = 545.00 : x
  2. Step 2: Convert to fraction form
    1,031.58/1,547.87 = 545.00/x
  3. Step 3: Cross multiply
    1,031.58x = 1,547.87 × 545.00
  4. Step 4: Simplify right side
    1,031.58x = 843,578.69
  5. Step 5: Solve for x
    x = 843,578.69/1,031.58
  6. Step 6: Final answer
    x = 817.75

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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.