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Finding the Fourth Proportional to 612,045.86, 918,068.09 and 212,686.67

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Solution

The fourth proportional to 612,045.86, 918,068.09 and 212,686.67 is: 319,029.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,045.86 : 918,068.09 = 212,686.67 : x
  2. Step 2: Convert to fraction form
    612,045.86/918,068.09 = 212,686.67/x
  3. Step 3: Cross multiply
    612,045.86x = 918,068.09 × 212,686.67
  4. Step 4: Simplify right side
    612,045.86x = 195,260,846,127.10
  5. Step 5: Solve for x
    x = 195,260,846,127.10/612,045.86
  6. Step 6: Final answer
    x = 319,029.76

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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.