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Finding the Third Proportional to 145,111,974 and 315,732,657

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Solution

The third proportional to 145,111,974 and 315,732,657 is: 686,966,815.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    145,111,974 : 315,732,657 = 315,732,657 : x
  2. Step 2: Convert to fraction form
    145,111,974/315,732,657 = 315,732,657/x
  3. Step 3: Cross multiply
    145,111,974x = 315,732,657 × 315,732,657
  4. Step 4: Simplify right side
    145,111,974x = 99,687,110,696,279,648
  5. Step 5: Solve for x
    x = 99,687,110,696,279,648/145,111,974
  6. Step 6: Final answer
    x = 686,966,815.68

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Why These Related Problems?

These problems maintain the same ratio (2.18) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.