Home / 919,427.76-1,268,002.64-643,644.32

Finding the Fourth Proportional to 919,427.76, 1,268,002.64 and 643,644.32

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Solution

The fourth proportional to 919,427.76, 1,268,002.64 and 643,644.32 is: 887,663.75

Step by Step Solution

  1. Step 1: Write the proportion equation
    919,427.76 : 1,268,002.64 = 643,644.32 : x
  2. Step 2: Convert to fraction form
    919,427.76/1,268,002.64 = 643,644.32/x
  3. Step 3: Cross multiply
    919,427.76x = 1,268,002.64 × 643,644.32
  4. Step 4: Simplify right side
    919,427.76x = 816,142,696,981.01
  5. Step 5: Solve for x
    x = 816,142,696,981.01/919,427.76
  6. Step 6: Final answer
    x = 887,663.75

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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.