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Finding the Fourth Proportional to 451,643.40, 623,271.24 and 308,399.76

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Solution

The fourth proportional to 451,643.40, 623,271.24 and 308,399.76 is: 425,593.95

Step by Step Solution

  1. Step 1: Write the proportion equation
    451,643.40 : 623,271.24 = 308,399.76 : x
  2. Step 2: Convert to fraction form
    451,643.40/623,271.24 = 308,399.76/x
  3. Step 3: Cross multiply
    451,643.40x = 623,271.24 × 308,399.76
  4. Step 4: Simplify right side
    451,643.40x = 192,216,700,830.90
  5. Step 5: Solve for x
    x = 192,216,700,830.90/451,643.40
  6. Step 6: Final answer
    x = 425,593.95

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.