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Finding the Fourth Proportional to 631,240.40, 946,399.80 and 257,070.80

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Solution

The fourth proportional to 631,240.40, 946,399.80 and 257,070.80 is: 385,418.54

Step by Step Solution

  1. Step 1: Write the proportion equation
    631,240.40 : 946,399.80 = 257,070.80 : x
  2. Step 2: Convert to fraction form
    631,240.40/946,399.80 = 257,070.80/x
  3. Step 3: Cross multiply
    631,240.40x = 946,399.80 × 257,070.80
  4. Step 4: Simplify right side
    631,240.40x = 243,291,753,705.84
  5. Step 5: Solve for x
    x = 243,291,753,705.84/631,240.40
  6. Step 6: Final answer
    x = 385,418.54

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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.