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Finding the Fourth Proportional to 620,291.10, 930,436.65 and 407,714.70

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Solution

The fourth proportional to 620,291.10, 930,436.65 and 407,714.70 is: 611,572.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,291.10 : 930,436.65 = 407,714.70 : x
  2. Step 2: Convert to fraction form
    620,291.10/930,436.65 = 407,714.70/x
  3. Step 3: Cross multiply
    620,291.10x = 930,436.65 × 407,714.70
  4. Step 4: Simplify right side
    620,291.10x = 379,352,699,623.76
  5. Step 5: Solve for x
    x = 379,352,699,623.76/620,291.10
  6. Step 6: Final answer
    x = 611,572.05

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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.