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Finding the Fourth Proportional to 402,485.67, 603,893.70 and 212,895.36

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Solution

The fourth proportional to 402,485.67, 603,893.70 and 212,895.36 is: 319,430.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,485.67 : 603,893.70 = 212,895.36 : x
  2. Step 2: Convert to fraction form
    402,485.67/603,893.70 = 212,895.36/x
  3. Step 3: Cross multiply
    402,485.67x = 603,893.70 × 212,895.36
  4. Step 4: Simplify right side
    402,485.67x = 128,566,166,663.23
  5. Step 5: Solve for x
    x = 128,566,166,663.23/402,485.67
  6. Step 6: Final answer
    x = 319,430.42

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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.