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Finding the Third Proportional to 142,582 and 312,380

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Solution

The third proportional to 142,582 and 312,380 is: 684,386.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    142,582 : 312,380 = 312,380 : x
  2. Step 2: Convert to fraction form
    142,582/312,380 = 312,380/x
  3. Step 3: Cross multiply
    142,582x = 312,380 × 312,380
  4. Step 4: Simplify right side
    142,582x = 97,581,264,400
  5. Step 5: Solve for x
    x = 97,581,264,400/142,582
  6. Step 6: Final answer
    x = 684,386.98

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Why These Related Problems?

These problems maintain the same ratio (2.19) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.