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Finding the Fourth Proportional to 540.65, 810.05 and 358.40

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Solution

The fourth proportional to 540.65, 810.05 and 358.40 is: 536.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    540.65 : 810.05 = 358.40 : x
  2. Step 2: Convert to fraction form
    540.65/810.05 = 358.40/x
  3. Step 3: Cross multiply
    540.65x = 810.05 × 358.40
  4. Step 4: Simplify right side
    540.65x = 290,316.08
  5. Step 5: Solve for x
    x = 290,316.08/540.65
  6. Step 6: Final answer
    x = 536.98

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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.