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Finding the Fourth Proportional to 279,364.86, 385,564.14 and 156,870.98

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Solution

The fourth proportional to 279,364.86, 385,564.14 and 156,870.98 is: 216,504.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    279,364.86 : 385,564.14 = 156,870.98 : x
  2. Step 2: Convert to fraction form
    279,364.86/385,564.14 = 156,870.98/x
  3. Step 3: Cross multiply
    279,364.86x = 385,564.14 × 156,870.98
  4. Step 4: Simplify right side
    279,364.86x = 60,483,824,494.66
  5. Step 5: Solve for x
    x = 60,483,824,494.66/279,364.86
  6. Step 6: Final answer
    x = 216,504.77

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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.