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Finding the Fourth Proportional to 666,457.38, 919,688.31 and 380,069.64

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Solution

The fourth proportional to 666,457.38, 919,688.31 and 380,069.64 is: 524,483.06

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,457.38 : 919,688.31 = 380,069.64 : x
  2. Step 2: Convert to fraction form
    666,457.38/919,688.31 = 380,069.64/x
  3. Step 3: Cross multiply
    666,457.38x = 919,688.31 × 380,069.64
  4. Step 4: Simplify right side
    666,457.38x = 349,545,604,893.91
  5. Step 5: Solve for x
    x = 349,545,604,893.91/666,457.38
  6. Step 6: Final answer
    x = 524,483.06

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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.