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Finding the Fourth Proportional to 711,319.77, 981,607.53 and 389,028.87

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Solution

The fourth proportional to 711,319.77, 981,607.53 and 389,028.87 is: 536,852.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,319.77 : 981,607.53 = 389,028.87 : x
  2. Step 2: Convert to fraction form
    711,319.77/981,607.53 = 389,028.87/x
  3. Step 3: Cross multiply
    711,319.77x = 981,607.53 × 389,028.87
  4. Step 4: Simplify right side
    711,319.77x = 381,873,668,179.39
  5. Step 5: Solve for x
    x = 381,873,668,179.39/711,319.77
  6. Step 6: Final answer
    x = 536,852.32

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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.