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Finding the Fourth Proportional to 711,658.74, 982,080.34 and 389,364.20

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Solution

The fourth proportional to 711,658.74, 982,080.34 and 389,364.20 is: 537,317.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,658.74 : 982,080.34 = 389,364.20 : x
  2. Step 2: Convert to fraction form
    711,658.74/982,080.34 = 389,364.20/x
  3. Step 3: Cross multiply
    711,658.74x = 982,080.34 × 389,364.20
  4. Step 4: Simplify right side
    711,658.74x = 382,386,925,919.83
  5. Step 5: Solve for x
    x = 382,386,925,919.83/711,658.74
  6. Step 6: Final answer
    x = 537,317.82

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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.