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Finding the Third Proportional to 290,654 and 390,594

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Solution

The third proportional to 290,654 and 390,594 is: 524,897.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    290,654 : 390,594 = 390,594 : x
  2. Step 2: Convert to fraction form
    290,654/390,594 = 390,594/x
  3. Step 3: Cross multiply
    290,654x = 390,594 × 390,594
  4. Step 4: Simplify right side
    290,654x = 152,563,672,836
  5. Step 5: Solve for x
    x = 152,563,672,836/290,654
  6. Step 6: Final answer
    x = 524,897.90

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Why These Related Problems?

These problems maintain the same ratio (1.34) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.