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Finding the Fourth Proportional to 680,678.40, 939,083.52 and 679,628.64

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Solution

The fourth proportional to 680,678.40, 939,083.52 and 679,628.64 is: 937,635.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    680,678.40 : 939,083.52 = 679,628.64 : x
  2. Step 2: Convert to fraction form
    680,678.40/939,083.52 = 679,628.64/x
  3. Step 3: Cross multiply
    680,678.40x = 939,083.52 × 679,628.64
  4. Step 4: Simplify right side
    680,678.40x = 638,228,055,544.01
  5. Step 5: Solve for x
    x = 638,228,055,544.01/680,678.40
  6. Step 6: Final answer
    x = 937,635.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.