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Finding the Fourth Proportional to 713,783.04, 985,048.16 and 391,506.72

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Solution

The fourth proportional to 713,783.04, 985,048.16 and 391,506.72 is: 540,294.39

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,783.04 : 985,048.16 = 391,506.72 : x
  2. Step 2: Convert to fraction form
    713,783.04/985,048.16 = 391,506.72/x
  3. Step 3: Cross multiply
    713,783.04x = 985,048.16 × 391,506.72
  4. Step 4: Simplify right side
    713,783.04x = 385,652,974,163.64
  5. Step 5: Solve for x
    x = 385,652,974,163.64/713,783.04
  6. Step 6: Final answer
    x = 540,294.39

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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.