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Finding the Fourth Proportional to 657,216.64, 907,191.36 and 388,944

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Solution

The fourth proportional to 657,216.64, 907,191.36 and 388,944 is: 536,880.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,216.64 : 907,191.36 = 388,944 : x
  2. Step 2: Convert to fraction form
    657,216.64/907,191.36 = 388,944/x
  3. Step 3: Cross multiply
    657,216.64x = 907,191.36 × 388,944
  4. Step 4: Simplify right side
    657,216.64x = 352,846,636,323.84
  5. Step 5: Solve for x
    x = 352,846,636,323.84/657,216.64
  6. Step 6: Final answer
    x = 536,880.25

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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.