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Finding the Third Proportional to 208,562,779.88 and 315,528,438.38

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Solution

The third proportional to 208,562,779.88 and 315,528,438.38 is: 477,353,607.79

Step by Step Solution

  1. Step 1: Write the proportion equation
    208,562,779.88 : 315,528,438.38 = 315,528,438.38 : x
  2. Step 2: Convert to fraction form
    208,562,779.88/315,528,438.38 = 315,528,438.38/x
  3. Step 3: Cross multiply
    208,562,779.88x = 315,528,438.38 × 315,528,438.38
  4. Step 4: Simplify right side
    208,562,779.88x = 99,558,195,423,366,176
  5. Step 5: Solve for x
    x = 99,558,195,423,366,176/208,562,779.88
  6. Step 6: Final answer
    x = 477,353,607.79

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Why These Related Problems?

These problems maintain the same ratio (1.51) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.