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Finding the Fourth Proportional to 528,015.38, 728,656.61 and 298,617.80

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Solution

The fourth proportional to 528,015.38, 728,656.61 and 298,617.80 is: 412,089.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,015.38 : 728,656.61 = 298,617.80 : x
  2. Step 2: Convert to fraction form
    528,015.38/728,656.61 = 298,617.80/x
  3. Step 3: Cross multiply
    528,015.38x = 728,656.61 × 298,617.80
  4. Step 4: Simplify right side
    528,015.38x = 217,589,828,697.29
  5. Step 5: Solve for x
    x = 217,589,828,697.29/528,015.38
  6. Step 6: Final answer
    x = 412,089.95

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1.5x scale

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.