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Finding the Fourth Proportional to 354,608.40, 489,681.54 and 263,931.24

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Solution

The fourth proportional to 354,608.40, 489,681.54 and 263,931.24 is: 364,464.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    354,608.40 : 489,681.54 = 263,931.24 : x
  2. Step 2: Convert to fraction form
    354,608.40/489,681.54 = 263,931.24/x
  3. Step 3: Cross multiply
    354,608.40x = 489,681.54 × 263,931.24
  4. Step 4: Simplify right side
    354,608.40x = 129,242,256,057.31
  5. Step 5: Solve for x
    x = 129,242,256,057.31/354,608.40
  6. Step 6: Final answer
    x = 364,464.73

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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.