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Finding the Fourth Proportional to 56,648.40, 84,980.70 and 19,210.20

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Solution

The fourth proportional to 56,648.40, 84,980.70 and 19,210.20 is: 28,818.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    56,648.40 : 84,980.70 = 19,210.20 : x
  2. Step 2: Convert to fraction form
    56,648.40/84,980.70 = 19,210.20/x
  3. Step 3: Cross multiply
    56,648.40x = 84,980.70 × 19,210.20
  4. Step 4: Simplify right side
    56,648.40x = 1,632,496,243.14
  5. Step 5: Solve for x
    x = 1,632,496,243.14/56,648.40
  6. Step 6: Final answer
    x = 28,818.05

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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.