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Finding the Fourth Proportional to 1,256,978.40, 1,734,666.36 and 684,054.88

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Solution

The fourth proportional to 1,256,978.40, 1,734,666.36 and 684,054.88 is: 944,015.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,256,978.40 : 1,734,666.36 = 684,054.88 : x
  2. Step 2: Convert to fraction form
    1,256,978.40/1,734,666.36 = 684,054.88/x
  3. Step 3: Cross multiply
    1,256,978.40x = 1,734,666.36 × 684,054.88
  4. Step 4: Simplify right side
    1,256,978.40x = 1,186,606,988,729.84
  5. Step 5: Solve for x
    x = 1,186,606,988,729.84/1,256,978.40
  6. Step 6: Final answer
    x = 944,015.42

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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.