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Finding the Fourth Proportional to 660,477.36, 911,737.78 and 445,908.06

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Solution

The fourth proportional to 660,477.36, 911,737.78 and 445,908.06 is: 615,541.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    660,477.36 : 911,737.78 = 445,908.06 : x
  2. Step 2: Convert to fraction form
    660,477.36/911,737.78 = 445,908.06/x
  3. Step 3: Cross multiply
    660,477.36x = 911,737.78 × 445,908.06
  4. Step 4: Simplify right side
    660,477.36x = 406,551,224,708.51
  5. Step 5: Solve for x
    x = 406,551,224,708.51/660,477.36
  6. Step 6: Final answer
    x = 615,541.50

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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.