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Finding the Fourth Proportional to 612,611.76, 918,317.64 and 342,871.62

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Solution

The fourth proportional to 612,611.76, 918,317.64 and 342,871.62 is: 513,971.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,611.76 : 918,317.64 = 342,871.62 : x
  2. Step 2: Convert to fraction form
    612,611.76/918,317.64 = 342,871.62/x
  3. Step 3: Cross multiply
    612,611.76x = 918,317.64 × 342,871.62
  4. Step 4: Simplify right side
    612,611.76x = 314,865,056,901.38
  5. Step 5: Solve for x
    x = 314,865,056,901.38/612,611.76
  6. Step 6: Final answer
    x = 513,971.62

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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.