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Finding the Fourth Proportional to 709,811.60, 979,494.41 and 387,521.01

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Solution

The fourth proportional to 709,811.60, 979,494.41 and 387,521.01 is: 534,754.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,811.60 : 979,494.41 = 387,521.01 : x
  2. Step 2: Convert to fraction form
    709,811.60/979,494.41 = 387,521.01/x
  3. Step 3: Cross multiply
    709,811.60x = 979,494.41 × 387,521.01
  4. Step 4: Simplify right side
    709,811.60x = 379,574,664,021.36
  5. Step 5: Solve for x
    x = 379,574,664,021.36/709,811.60
  6. Step 6: Final answer
    x = 534,754.10

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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.