Home / 716,981.90-989,463.20-394,721.98

Finding the Fourth Proportional to 716,981.90, 989,463.20 and 394,721.98

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Solution

The fourth proportional to 716,981.90, 989,463.20 and 394,721.98 is: 544,731.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,981.90 : 989,463.20 = 394,721.98 : x
  2. Step 2: Convert to fraction form
    716,981.90/989,463.20 = 394,721.98/x
  3. Step 3: Cross multiply
    716,981.90x = 989,463.20 × 394,721.98
  4. Step 4: Simplify right side
    716,981.90x = 390,562,868,993.87
  5. Step 5: Solve for x
    x = 390,562,868,993.87/716,981.90
  6. Step 6: Final answer
    x = 544,731.84

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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.