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Finding the Fourth Proportional to 490,090.30, 687,526.10 and 490,090.30

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Solution

The fourth proportional to 490,090.30, 687,526.10 and 490,090.30 is: 687,526.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,090.30 : 687,526.10 = 490,090.30 : x
  2. Step 2: Convert to fraction form
    490,090.30/687,526.10 = 490,090.30/x
  3. Step 3: Cross multiply
    490,090.30x = 687,526.10 × 490,090.30
  4. Step 4: Simplify right side
    490,090.30x = 336,949,872,606.83
  5. Step 5: Solve for x
    x = 336,949,872,606.83/490,090.30
  6. Step 6: Final answer
    x = 687,526.10

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.