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Finding the Third Proportional to 257,064,772.50 and 391,620,399.75

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Solution

The third proportional to 257,064,772.50 and 391,620,399.75 is: 596,606,590.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    257,064,772.50 : 391,620,399.75 = 391,620,399.75 : x
  2. Step 2: Convert to fraction form
    257,064,772.50/391,620,399.75 = 391,620,399.75/x
  3. Step 3: Cross multiply
    257,064,772.50x = 391,620,399.75 × 391,620,399.75
  4. Step 4: Simplify right side
    257,064,772.50x = 153,366,537,500,349,792
  5. Step 5: Solve for x
    x = 153,366,537,500,349,792/257,064,772.50
  6. Step 6: Final answer
    x = 596,606,590.66

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Why These Related Problems?

These problems maintain the same ratio (1.52) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.