Home / 712,814.48-983,685.23-390,517.64

Finding the Fourth Proportional to 712,814.48, 983,685.23 and 390,517.64

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Solution

The fourth proportional to 712,814.48, 983,685.23 and 390,517.64 is: 538,915.02

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,814.48 : 983,685.23 = 390,517.64 : x
  2. Step 2: Convert to fraction form
    712,814.48/983,685.23 = 390,517.64/x
  3. Step 3: Cross multiply
    712,814.48x = 983,685.23 × 390,517.64
  4. Step 4: Simplify right side
    712,814.48x = 384,146,427,651.44
  5. Step 5: Solve for x
    x = 384,146,427,651.44/712,814.48
  6. Step 6: Final answer
    x = 538,915.02

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Double scale
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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.