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Finding the Third Proportional to 390,288 and 602,520

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Solution

The third proportional to 390,288 and 602,520 is: 930,160.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,288 : 602,520 = 602,520 : x
  2. Step 2: Convert to fraction form
    390,288/602,520 = 602,520/x
  3. Step 3: Cross multiply
    390,288x = 602,520 × 602,520
  4. Step 4: Simplify right side
    390,288x = 363,030,350,400
  5. Step 5: Solve for x
    x = 363,030,350,400/390,288
  6. Step 6: Final answer
    x = 930,160.16

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Why These Related Problems?

These problems maintain the same ratio (1.54) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.