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Finding the Fourth Proportional to 612,061.36, 918,239.64 and 212,644

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Solution

The fourth proportional to 612,061.36, 918,239.64 and 212,644 is: 319,017.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,061.36 : 918,239.64 = 212,644 : x
  2. Step 2: Convert to fraction form
    612,061.36/918,239.64 = 212,644/x
  3. Step 3: Cross multiply
    612,061.36x = 918,239.64 × 212,644
  4. Step 4: Simplify right side
    612,061.36x = 195,258,150,008.16
  5. Step 5: Solve for x
    x = 195,258,150,008.16/612,061.36
  6. Step 6: Final answer
    x = 319,017.28

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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.