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Finding the Fourth Proportional to 1,652.01, 2,477.80 and 419.31

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Solution

The fourth proportional to 1,652.01, 2,477.80 and 419.31 is: 628.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,652.01 : 2,477.80 = 419.31 : x
  2. Step 2: Convert to fraction form
    1,652.01/2,477.80 = 419.31/x
  3. Step 3: Cross multiply
    1,652.01x = 2,477.80 × 419.31
  4. Step 4: Simplify right side
    1,652.01x = 1,038,966.32
  5. Step 5: Solve for x
    x = 1,038,966.32/1,652.01
  6. Step 6: Final answer
    x = 628.91

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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.