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Finding the Fourth Proportional to 620,636.40, 931,127.40 and 305,103.60

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Solution

The fourth proportional to 620,636.40, 931,127.40 and 305,103.60 is: 457,740.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,636.40 : 931,127.40 = 305,103.60 : x
  2. Step 2: Convert to fraction form
    620,636.40/931,127.40 = 305,103.60/x
  3. Step 3: Cross multiply
    620,636.40x = 931,127.40 × 305,103.60
  4. Step 4: Simplify right side
    620,636.40x = 284,090,321,798.64
  5. Step 5: Solve for x
    x = 284,090,321,798.64/620,636.40
  6. Step 6: Final answer
    x = 457,740.35

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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.