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Finding the Third Proportional to 292,779,177 and 390,328,680

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Solution

The third proportional to 292,779,177 and 390,328,680 is: 520,380,171.81

Step by Step Solution

  1. Step 1: Write the proportion equation
    292,779,177 : 390,328,680 = 390,328,680 : x
  2. Step 2: Convert to fraction form
    292,779,177/390,328,680 = 390,328,680/x
  3. Step 3: Cross multiply
    292,779,177x = 390,328,680 × 390,328,680
  4. Step 4: Simplify right side
    292,779,177x = 152,356,478,430,542,400
  5. Step 5: Solve for x
    x = 152,356,478,430,542,400/292,779,177
  6. Step 6: Final answer
    x = 520,380,171.81

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Why These Related Problems?

These problems maintain the same ratio (1.33) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.