Home / 712,814.10-983,684.70-390,517.26

Finding the Fourth Proportional to 712,814.10, 983,684.70 and 390,517.26

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Solution

The fourth proportional to 712,814.10, 983,684.70 and 390,517.26 is: 538,914.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,814.10 : 983,684.70 = 390,517.26 : x
  2. Step 2: Convert to fraction form
    712,814.10/983,684.70 = 390,517.26/x
  3. Step 3: Cross multiply
    712,814.10x = 983,684.70 × 390,517.26
  4. Step 4: Simplify right side
    712,814.10x = 384,145,853,747.92
  5. Step 5: Solve for x
    x = 384,145,853,747.92/712,814.10
  6. Step 6: Final answer
    x = 538,914.50

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Double scale
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Similar ratio
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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.