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Finding the Fourth Proportional to 620,555.45, 930,886.70 and 171,276.32

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Solution

The fourth proportional to 620,555.45, 930,886.70 and 171,276.32 is: 256,929.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,555.45 : 930,886.70 = 171,276.32 : x
  2. Step 2: Convert to fraction form
    620,555.45/930,886.70 = 171,276.32/x
  3. Step 3: Cross multiply
    620,555.45x = 930,886.70 × 171,276.32
  4. Step 4: Simplify right side
    620,555.45x = 159,438,842,802.13
  5. Step 5: Solve for x
    x = 159,438,842,802.13/620,555.45
  6. Step 6: Final answer
    x = 256,929.25

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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.