Home / 662,415.36-914,252.88-390,467.60

Finding the Fourth Proportional to 662,415.36, 914,252.88 and 390,467.60

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Solution

The fourth proportional to 662,415.36, 914,252.88 and 390,467.60 is: 538,915.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    662,415.36 : 914,252.88 = 390,467.60 : x
  2. Step 2: Convert to fraction form
    662,415.36/914,252.88 = 390,467.60/x
  3. Step 3: Cross multiply
    662,415.36x = 914,252.88 × 390,467.60
  4. Step 4: Simplify right side
    662,415.36x = 356,986,127,846.69
  5. Step 5: Solve for x
    x = 356,986,127,846.69/662,415.36
  6. Step 6: Final answer
    x = 538,915.84

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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.