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Finding the Fourth Proportional to 448,628.16, 619,144.08 and 257,678.40

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Solution

The fourth proportional to 448,628.16, 619,144.08 and 257,678.40 is: 355,617.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    448,628.16 : 619,144.08 = 257,678.40 : x
  2. Step 2: Convert to fraction form
    448,628.16/619,144.08 = 257,678.40/x
  3. Step 3: Cross multiply
    448,628.16x = 619,144.08 × 257,678.40
  4. Step 4: Simplify right side
    448,628.16x = 159,540,055,903.87
  5. Step 5: Solve for x
    x = 159,540,055,903.87/448,628.16
  6. Step 6: Final answer
    x = 355,617.57

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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.