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Finding the Fourth Proportional to 618,345.90, 866,384.10 and 618,345.90

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Solution

The fourth proportional to 618,345.90, 866,384.10 and 618,345.90 is: 866,384.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    618,345.90 : 866,384.10 = 618,345.90 : x
  2. Step 2: Convert to fraction form
    618,345.90/866,384.10 = 618,345.90/x
  3. Step 3: Cross multiply
    618,345.90x = 866,384.10 × 618,345.90
  4. Step 4: Simplify right side
    618,345.90x = 535,725,056,060.19
  5. Step 5: Solve for x
    x = 535,725,056,060.19/618,345.90
  6. Step 6: Final answer
    x = 866,384.10

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.