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Finding the Fourth Proportional to 877,691.64, 1,316,420.82 and 345,069.66

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Solution

The fourth proportional to 877,691.64, 1,316,420.82 and 345,069.66 is: 517,558.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    877,691.64 : 1,316,420.82 = 345,069.66 : x
  2. Step 2: Convert to fraction form
    877,691.64/1,316,420.82 = 345,069.66/x
  3. Step 3: Cross multiply
    877,691.64x = 1,316,420.82 × 345,069.66
  4. Step 4: Simplify right side
    877,691.64x = 454,256,884,774.32
  5. Step 5: Solve for x
    x = 454,256,884,774.32/877,691.64
  6. Step 6: Final answer
    x = 517,558.63

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.