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Finding the Fourth Proportional to 971,421.94, 1,340,571 and 535,855.96

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Solution

The fourth proportional to 971,421.94, 1,340,571 and 535,855.96 is: 739,486.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    971,421.94 : 1,340,571 = 535,855.96 : x
  2. Step 2: Convert to fraction form
    971,421.94/1,340,571 = 535,855.96/x
  3. Step 3: Cross multiply
    971,421.94x = 1,340,571 × 535,855.96
  4. Step 4: Simplify right side
    971,421.94x = 718,352,960,153.16
  5. Step 5: Solve for x
    x = 718,352,960,153.16/971,421.94
  6. Step 6: Final answer
    x = 739,486.04

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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.