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Finding the Fourth Proportional to 388,889.40, 583,334.10 and 300,315.90

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Solution

The fourth proportional to 388,889.40, 583,334.10 and 300,315.90 is: 450,473.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    388,889.40 : 583,334.10 = 300,315.90 : x
  2. Step 2: Convert to fraction form
    388,889.40/583,334.10 = 300,315.90/x
  3. Step 3: Cross multiply
    388,889.40x = 583,334.10 × 300,315.90
  4. Step 4: Simplify right side
    388,889.40x = 175,184,505,242.19
  5. Step 5: Solve for x
    x = 175,184,505,242.19/388,889.40
  6. Step 6: Final answer
    x = 450,473.85

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1.5x scale

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.