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Finding the Fourth Proportional to 712,541.64, 983,270.64 and 390,189.54

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Solution

The fourth proportional to 712,541.64, 983,270.64 and 390,189.54 is: 538,441.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    712,541.64 : 983,270.64 = 390,189.54 : x
  2. Step 2: Convert to fraction form
    712,541.64/983,270.64 = 390,189.54/x
  3. Step 3: Cross multiply
    712,541.64x = 983,270.64 × 390,189.54
  4. Step 4: Simplify right side
    712,541.64x = 383,661,918,717.11
  5. Step 5: Solve for x
    x = 383,661,918,717.11/712,541.64
  6. Step 6: Final answer
    x = 538,441.40

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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.