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Finding the Fourth Proportional to 388,868.40, 583,302.60 and 211,460.40

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Solution

The fourth proportional to 388,868.40, 583,302.60 and 211,460.40 is: 317,190.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,868.40 : 583,302.60 = 211,460.40 : x
  2. Step 2: Convert to fraction form
    388,868.40/583,302.60 = 211,460.40/x
  3. Step 3: Cross multiply
    388,868.40x = 583,302.60 × 211,460.40
  4. Step 4: Simplify right side
    388,868.40x = 123,345,401,117.04
  5. Step 5: Solve for x
    x = 123,345,401,117.04/388,868.40
  6. Step 6: Final answer
    x = 317,190.60

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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.