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Finding the Fourth Proportional to 709,900.92, 979,676.91 and 387,623.79

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Solution

The fourth proportional to 709,900.92, 979,676.91 and 387,623.79 is: 534,928.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,900.92 : 979,676.91 = 387,623.79 : x
  2. Step 2: Convert to fraction form
    709,900.92/979,676.91 = 387,623.79/x
  3. Step 3: Cross multiply
    709,900.92x = 979,676.91 × 387,623.79
  4. Step 4: Simplify right side
    709,900.92x = 379,746,076,829.69
  5. Step 5: Solve for x
    x = 379,746,076,829.69/709,900.92
  6. Step 6: Final answer
    x = 534,928.28

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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.