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Finding the Third Proportional to 390,428 and 852,460

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Solution

The third proportional to 390,428 and 852,460 is: 1,861,260.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,428 : 852,460 = 852,460 : x
  2. Step 2: Convert to fraction form
    390,428/852,460 = 852,460/x
  3. Step 3: Cross multiply
    390,428x = 852,460 × 852,460
  4. Step 4: Simplify right side
    390,428x = 726,688,051,600
  5. Step 5: Solve for x
    x = 726,688,051,600/390,428
  6. Step 6: Final answer
    x = 1,861,260.08

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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.