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Finding the Fourth Proportional to 647,541.90, 971,312.85 and 411,345.90

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Solution

The fourth proportional to 647,541.90, 971,312.85 and 411,345.90 is: 617,018.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,541.90 : 971,312.85 = 411,345.90 : x
  2. Step 2: Convert to fraction form
    647,541.90/971,312.85 = 411,345.90/x
  3. Step 3: Cross multiply
    647,541.90x = 971,312.85 × 411,345.90
  4. Step 4: Simplify right side
    647,541.90x = 399,545,558,464.82
  5. Step 5: Solve for x
    x = 399,545,558,464.82/647,541.90
  6. Step 6: Final answer
    x = 617,018.85

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Similar ratio
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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.