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Finding the Fourth Proportional to 630,533.89, 869,909.40 and 485,384.07

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Solution

The fourth proportional to 630,533.89, 869,909.40 and 485,384.07 is: 669,654.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    630,533.89 : 869,909.40 = 485,384.07 : x
  2. Step 2: Convert to fraction form
    630,533.89/869,909.40 = 485,384.07/x
  3. Step 3: Cross multiply
    630,533.89x = 869,909.40 × 485,384.07
  4. Step 4: Simplify right side
    630,533.89x = 422,240,164,553.66
  5. Step 5: Solve for x
    x = 422,240,164,553.66/630,533.89
  6. Step 6: Final answer
    x = 669,654.98

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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.