Home / 388,962.40-583,443.60-212,015.20

Finding the Fourth Proportional to 388,962.40, 583,443.60 and 212,015.20

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Solution

The fourth proportional to 388,962.40, 583,443.60 and 212,015.20 is: 318,022.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,962.40 : 583,443.60 = 212,015.20 : x
  2. Step 2: Convert to fraction form
    388,962.40/583,443.60 = 212,015.20/x
  3. Step 3: Cross multiply
    388,962.40x = 583,443.60 × 212,015.20
  4. Step 4: Simplify right side
    388,962.40x = 123,698,911,542.72
  5. Step 5: Solve for x
    x = 123,698,911,542.72/388,962.40
  6. Step 6: Final answer
    x = 318,022.80

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.