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Finding the Fourth Proportional to 647,815.60, 971,723.40 and 561,210.40

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Solution

The fourth proportional to 647,815.60, 971,723.40 and 561,210.40 is: 841,815.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    647,815.60 : 971,723.40 = 561,210.40 : x
  2. Step 2: Convert to fraction form
    647,815.60/971,723.40 = 561,210.40/x
  3. Step 3: Cross multiply
    647,815.60x = 971,723.40 × 561,210.40
  4. Step 4: Simplify right side
    647,815.60x = 545,341,278,003.36
  5. Step 5: Solve for x
    x = 545,341,278,003.36/647,815.60
  6. Step 6: Final answer
    x = 841,815.60

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Double scale
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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.