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Finding the Fourth Proportional to 421,740.20, 632,610.30 and 403,538.60

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Solution

The fourth proportional to 421,740.20, 632,610.30 and 403,538.60 is: 605,307.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    421,740.20 : 632,610.30 = 403,538.60 : x
  2. Step 2: Convert to fraction form
    421,740.20/632,610.30 = 403,538.60/x
  3. Step 3: Cross multiply
    421,740.20x = 632,610.30 × 403,538.60
  4. Step 4: Simplify right side
    421,740.20x = 255,282,674,807.58
  5. Step 5: Solve for x
    x = 255,282,674,807.58/421,740.20
  6. Step 6: Final answer
    x = 605,307.90

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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.