Home / 712,563.21-983,337.57-390,293.78

Finding the Fourth Proportional to 712,563.21, 983,337.57 and 390,293.78

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Solution

The fourth proportional to 712,563.21, 983,337.57 and 390,293.78 is: 538,605.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,563.21 : 983,337.57 = 390,293.78 : x
  2. Step 2: Convert to fraction form
    712,563.21/983,337.57 = 390,293.78/x
  3. Step 3: Cross multiply
    712,563.21x = 983,337.57 × 390,293.78
  4. Step 4: Simplify right side
    712,563.21x = 383,790,532,294.63
  5. Step 5: Solve for x
    x = 383,790,532,294.63/712,563.21
  6. Step 6: Final answer
    x = 538,605.60

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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.