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Finding the Fourth Proportional to 518,384.02, 715,461.52 and 411,767.78

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Solution

The fourth proportional to 518,384.02, 715,461.52 and 411,767.78 is: 568,312.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    518,384.02 : 715,461.52 = 411,767.78 : x
  2. Step 2: Convert to fraction form
    518,384.02/715,461.52 = 411,767.78/x
  3. Step 3: Cross multiply
    518,384.02x = 715,461.52 × 411,767.78
  4. Step 4: Simplify right side
    518,384.02x = 294,604,001,765.83
  5. Step 5: Solve for x
    x = 294,604,001,765.83/518,384.02
  6. Step 6: Final answer
    x = 568,312.28

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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.