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Finding the Fourth Proportional to 501,506.12, 751,107.18 and 421,603.40

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Solution

The fourth proportional to 501,506.12, 751,107.18 and 421,603.40 is: 631,436.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    501,506.12 : 751,107.18 = 421,603.40 : x
  2. Step 2: Convert to fraction form
    501,506.12/751,107.18 = 421,603.40/x
  3. Step 3: Cross multiply
    501,506.12x = 751,107.18 × 421,603.40
  4. Step 4: Simplify right side
    501,506.12x = 316,669,340,852.41
  5. Step 5: Solve for x
    x = 316,669,340,852.41/501,506.12
  6. Step 6: Final answer
    x = 631,436.64

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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.