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Finding the Fourth Proportional to 681,784.71, 940,894.94 and 379,980.87

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Solution

The fourth proportional to 681,784.71, 940,894.94 and 379,980.87 is: 524,391.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    681,784.71 : 940,894.94 = 379,980.87 : x
  2. Step 2: Convert to fraction form
    681,784.71/940,894.94 = 379,980.87/x
  3. Step 3: Cross multiply
    681,784.71x = 940,894.94 × 379,980.87
  4. Step 4: Simplify right side
    681,784.71x = 357,522,075,979.89
  5. Step 5: Solve for x
    x = 357,522,075,979.89/681,784.71
  6. Step 6: Final answer
    x = 524,391.45

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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.