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Finding the Fourth Proportional to 620,585.80, 930,878.70 and 553,663.60

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Solution

The fourth proportional to 620,585.80, 930,878.70 and 553,663.60 is: 830,495.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,585.80 : 930,878.70 = 553,663.60 : x
  2. Step 2: Convert to fraction form
    620,585.80/930,878.70 = 553,663.60/x
  3. Step 3: Cross multiply
    620,585.80x = 930,878.70 × 553,663.60
  4. Step 4: Simplify right side
    620,585.80x = 515,393,652,205.32
  5. Step 5: Solve for x
    x = 515,393,652,205.32/620,585.80
  6. Step 6: Final answer
    x = 830,495.40

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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.