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Finding the Fourth Proportional to 877.29, 1,210.49 and 528.00

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Solution

The fourth proportional to 877.29, 1,210.49 and 528.00 is: 728.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    877.29 : 1,210.49 = 528.00 : x
  2. Step 2: Convert to fraction form
    877.29/1,210.49 = 528.00/x
  3. Step 3: Cross multiply
    877.29x = 1,210.49 × 528.00
  4. Step 4: Simplify right side
    877.29x = 639,130.03
  5. Step 5: Solve for x
    x = 639,130.03/877.29
  6. Step 6: Final answer
    x = 728.53

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Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.