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Finding the Fourth Proportional to 485,090.04, 669,065.64 and 355,984.91

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Solution

The fourth proportional to 485,090.04, 669,065.64 and 355,984.91 is: 490,996.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,090.04 : 669,065.64 = 355,984.91 : x
  2. Step 2: Convert to fraction form
    485,090.04/669,065.64 = 355,984.91/x
  3. Step 3: Cross multiply
    485,090.04x = 669,065.64 × 355,984.91
  4. Step 4: Simplify right side
    485,090.04x = 238,177,268,294.16
  5. Step 5: Solve for x
    x = 238,177,268,294.16/485,090.04
  6. Step 6: Final answer
    x = 490,996.00

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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.