Home / 712,717.20-983,550.06-390,438.96

Finding the Fourth Proportional to 712,717.20, 983,550.06 and 390,438.96

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Solution

The fourth proportional to 712,717.20, 983,550.06 and 390,438.96 is: 538,805.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,717.20 : 983,550.06 = 390,438.96 : x
  2. Step 2: Convert to fraction form
    712,717.20/983,550.06 = 390,438.96/x
  3. Step 3: Cross multiply
    712,717.20x = 983,550.06 × 390,438.96
  4. Step 4: Simplify right side
    712,717.20x = 384,016,262,534.34
  5. Step 5: Solve for x
    x = 384,016,262,534.34/712,717.20
  6. Step 6: Final answer
    x = 538,805.94

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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.