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Finding the Fourth Proportional to 679,643.50, 937,909.11 and 377,837.50

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Solution

The fourth proportional to 679,643.50, 937,909.11 and 377,837.50 is: 521,416.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,643.50 : 937,909.11 = 377,837.50 : x
  2. Step 2: Convert to fraction form
    679,643.50/937,909.11 = 377,837.50/x
  3. Step 3: Cross multiply
    679,643.50x = 937,909.11 × 377,837.50
  4. Step 4: Simplify right side
    679,643.50x = 354,377,233,349.63
  5. Step 5: Solve for x
    x = 354,377,233,349.63/679,643.50
  6. Step 6: Final answer
    x = 521,416.35

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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.