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Finding the Fourth Proportional to 688,495.50, 950,212.89 and 386,689.50

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Solution

The fourth proportional to 688,495.50, 950,212.89 and 386,689.50 is: 533,681.55

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,495.50 : 950,212.89 = 386,689.50 : x
  2. Step 2: Convert to fraction form
    688,495.50/950,212.89 = 386,689.50/x
  3. Step 3: Cross multiply
    688,495.50x = 950,212.89 × 386,689.50
  4. Step 4: Simplify right side
    688,495.50x = 367,437,347,327.66
  5. Step 5: Solve for x
    x = 367,437,347,327.66/688,495.50
  6. Step 6: Final answer
    x = 533,681.55

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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.