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Finding the Fourth Proportional to 286,521.98, 429,868.89 and 115,655.85

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Solution

The fourth proportional to 286,521.98, 429,868.89 and 115,655.85 is: 173,518.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    286,521.98 : 429,868.89 = 115,655.85 : x
  2. Step 2: Convert to fraction form
    286,521.98/429,868.89 = 115,655.85/x
  3. Step 3: Cross multiply
    286,521.98x = 429,868.89 × 115,655.85
  4. Step 4: Simplify right side
    286,521.98x = 49,716,851,861.51
  5. Step 5: Solve for x
    x = 49,716,851,861.51/286,521.98
  6. Step 6: Final answer
    x = 173,518.46

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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.