Home / 691,721.56-954,788.88-405,334.72

Finding the Fourth Proportional to 691,721.56, 954,788.88 and 405,334.72

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Solution

The fourth proportional to 691,721.56, 954,788.88 and 405,334.72 is: 559,486.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,721.56 : 954,788.88 = 405,334.72 : x
  2. Step 2: Convert to fraction form
    691,721.56/954,788.88 = 405,334.72/x
  3. Step 3: Cross multiply
    691,721.56x = 954,788.88 × 405,334.72
  4. Step 4: Simplify right side
    691,721.56x = 387,009,083,333.91
  5. Step 5: Solve for x
    x = 387,009,083,333.91/691,721.56
  6. Step 6: Final answer
    x = 559,486.80

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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.