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Finding the Fourth Proportional to 487,720.10, 683,274.70 and 487,720.10

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Solution

The fourth proportional to 487,720.10, 683,274.70 and 487,720.10 is: 683,274.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    487,720.10 : 683,274.70 = 487,720.10 : x
  2. Step 2: Convert to fraction form
    487,720.10/683,274.70 = 487,720.10/x
  3. Step 3: Cross multiply
    487,720.10x = 683,274.70 × 487,720.10
  4. Step 4: Simplify right side
    487,720.10x = 333,246,805,011.47
  5. Step 5: Solve for x
    x = 333,246,805,011.47/487,720.10
  6. Step 6: Final answer
    x = 683,274.70

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Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.