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Finding the Fourth Proportional to 928,605.28, 1,392,908.16 and 612,988.16

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Solution

The fourth proportional to 928,605.28, 1,392,908.16 and 612,988.16 is: 919,482.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    928,605.28 : 1,392,908.16 = 612,988.16 : x
  2. Step 2: Convert to fraction form
    928,605.28/1,392,908.16 = 612,988.16/x
  3. Step 3: Cross multiply
    928,605.28x = 1,392,908.16 × 612,988.16
  4. Step 4: Simplify right side
    928,605.28x = 853,836,210,047.39
  5. Step 5: Solve for x
    x = 853,836,210,047.39/928,605.28
  6. Step 6: Final answer
    x = 919,482.40

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.