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Finding the Fourth Proportional to 405,000.30, 607,500.45 and 385,317.30

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Solution

The fourth proportional to 405,000.30, 607,500.45 and 385,317.30 is: 577,975.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    405,000.30 : 607,500.45 = 385,317.30 : x
  2. Step 2: Convert to fraction form
    405,000.30/607,500.45 = 385,317.30/x
  3. Step 3: Cross multiply
    405,000.30x = 607,500.45 × 385,317.30
  4. Step 4: Simplify right side
    405,000.30x = 234,080,433,142.79
  5. Step 5: Solve for x
    x = 234,080,433,142.79/405,000.30
  6. Step 6: Final answer
    x = 577,975.95

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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.