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Finding the Fourth Proportional to 711,899.15, 982,421.22 and 389,609.06

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Solution

The fourth proportional to 711,899.15, 982,421.22 and 389,609.06 is: 537,660.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    711,899.15 : 982,421.22 = 389,609.06 : x
  2. Step 2: Convert to fraction form
    711,899.15/982,421.22 = 389,609.06/x
  3. Step 3: Cross multiply
    711,899.15x = 982,421.22 × 389,609.06
  4. Step 4: Simplify right side
    711,899.15x = 382,760,208,048.25
  5. Step 5: Solve for x
    x = 382,760,208,048.25/711,899.15
  6. Step 6: Final answer
    x = 537,660.72

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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.