Home / 712,406.31-983,091.16-390,110.85

Finding the Fourth Proportional to 712,406.31, 983,091.16 and 390,110.85

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Solution

The fourth proportional to 712,406.31, 983,091.16 and 390,110.85 is: 538,336.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,406.31 : 983,091.16 = 390,110.85 : x
  2. Step 2: Convert to fraction form
    712,406.31/983,091.16 = 390,110.85/x
  3. Step 3: Cross multiply
    712,406.31x = 983,091.16 × 390,110.85
  4. Step 4: Simplify right side
    712,406.31x = 383,514,528,542.73
  5. Step 5: Solve for x
    x = 383,514,528,542.73/712,406.31
  6. Step 6: Final answer
    x = 538,336.80

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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.