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Finding the Fourth Proportional to 612,762.10, 919,143.15 and 545,110.90

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Solution

The fourth proportional to 612,762.10, 919,143.15 and 545,110.90 is: 817,666.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,762.10 : 919,143.15 = 545,110.90 : x
  2. Step 2: Convert to fraction form
    612,762.10/919,143.15 = 545,110.90/x
  3. Step 3: Cross multiply
    612,762.10x = 919,143.15 × 545,110.90
  4. Step 4: Simplify right side
    612,762.10x = 501,034,949,725.34
  5. Step 5: Solve for x
    x = 501,034,949,725.34/612,762.10
  6. Step 6: Final answer
    x = 817,666.35

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Double scale
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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.