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Finding the Fourth Proportional to 674,313.40, 930,570.78 and 402,539.09

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Solution

The fourth proportional to 674,313.40, 930,570.78 and 402,539.09 is: 555,514.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    674,313.40 : 930,570.78 = 402,539.09 : x
  2. Step 2: Convert to fraction form
    674,313.40/930,570.78 = 402,539.09/x
  3. Step 3: Cross multiply
    674,313.40x = 930,570.78 × 402,539.09
  4. Step 4: Simplify right side
    674,313.40x = 374,591,114,961.79
  5. Step 5: Solve for x
    x = 374,591,114,961.79/674,313.40
  6. Step 6: Final answer
    x = 555,514.86

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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.