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Finding the Fourth Proportional to 478,516.68, 717,737.36 and 208,638.45

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Solution

The fourth proportional to 478,516.68, 717,737.36 and 208,638.45 is: 312,941.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,516.68 : 717,737.36 = 208,638.45 : x
  2. Step 2: Convert to fraction form
    478,516.68/717,737.36 = 208,638.45/x
  3. Step 3: Cross multiply
    478,516.68x = 717,737.36 × 208,638.45
  4. Step 4: Simplify right side
    478,516.68x = 149,747,609,254.30
  5. Step 5: Solve for x
    x = 149,747,609,254.30/478,516.68
  6. Step 6: Final answer
    x = 312,941.25

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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.