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Finding the Fourth Proportional to 421,788.26, 583,187.55 and 368,644.16

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Solution

The fourth proportional to 421,788.26, 583,187.55 and 368,644.16 is: 509,707.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,788.26 : 583,187.55 = 368,644.16 : x
  2. Step 2: Convert to fraction form
    421,788.26/583,187.55 = 368,644.16/x
  3. Step 3: Cross multiply
    421,788.26x = 583,187.55 × 368,644.16
  4. Step 4: Simplify right side
    421,788.26x = 214,988,684,567.76
  5. Step 5: Solve for x
    x = 214,988,684,567.76/421,788.26
  6. Step 6: Final answer
    x = 509,707.60

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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.