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Finding the Fourth Proportional to 656,392.89, 905,823 and 354,586.89

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Solution

The fourth proportional to 656,392.89, 905,823 and 354,586.89 is: 489,330.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,392.89 : 905,823 = 354,586.89 : x
  2. Step 2: Convert to fraction form
    656,392.89/905,823 = 354,586.89/x
  3. Step 3: Cross multiply
    656,392.89x = 905,823 × 354,586.89
  4. Step 4: Simplify right side
    656,392.89x = 321,192,960,460.47
  5. Step 5: Solve for x
    x = 321,192,960,460.47/656,392.89
  6. Step 6: Final answer
    x = 489,330.35

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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.