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Finding the Fourth Proportional to 1,575.60, 2,365.80 and 1,210.80

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Solution

The fourth proportional to 1,575.60, 2,365.80 and 1,210.80 is: 1,818.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,575.60 : 2,365.80 = 1,210.80 : x
  2. Step 2: Convert to fraction form
    1,575.60/2,365.80 = 1,210.80/x
  3. Step 3: Cross multiply
    1,575.60x = 2,365.80 × 1,210.80
  4. Step 4: Simplify right side
    1,575.60x = 2,864,510.64
  5. Step 5: Solve for x
    x = 2,864,510.64/1,575.60
  6. Step 6: Final answer
    x = 1,818.04

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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.