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Finding the Fourth Proportional to 489,261.96, 674,894.76 and 307,685.88

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Solution

The fourth proportional to 489,261.96, 674,894.76 and 307,685.88 is: 424,426.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,261.96 : 674,894.76 = 307,685.88 : x
  2. Step 2: Convert to fraction form
    489,261.96/674,894.76 = 307,685.88/x
  3. Step 3: Cross multiply
    489,261.96x = 674,894.76 × 307,685.88
  4. Step 4: Simplify right side
    489,261.96x = 207,655,588,137.99
  5. Step 5: Solve for x
    x = 207,655,588,137.99/489,261.96
  6. Step 6: Final answer
    x = 424,426.19

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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.