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Finding the Fourth Proportional to 385,615.30, 578,422.95 and 385,615.30

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Solution

The fourth proportional to 385,615.30, 578,422.95 and 385,615.30 is: 578,422.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    385,615.30 : 578,422.95 = 385,615.30 : x
  2. Step 2: Convert to fraction form
    385,615.30/578,422.95 = 385,615.30/x
  3. Step 3: Cross multiply
    385,615.30x = 578,422.95 × 385,615.30
  4. Step 4: Simplify right side
    385,615.30x = 223,048,739,391.14
  5. Step 5: Solve for x
    x = 223,048,739,391.14/385,615.30
  6. Step 6: Final answer
    x = 578,422.95

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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.