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Finding the Fourth Proportional to 623,920.60, 935,880.90 and 340,485.40

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Solution

The fourth proportional to 623,920.60, 935,880.90 and 340,485.40 is: 510,728.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    623,920.60 : 935,880.90 = 340,485.40 : x
  2. Step 2: Convert to fraction form
    623,920.60/935,880.90 = 340,485.40/x
  3. Step 3: Cross multiply
    623,920.60x = 935,880.90 × 340,485.40
  4. Step 4: Simplify right side
    623,920.60x = 318,653,782,588.86
  5. Step 5: Solve for x
    x = 318,653,782,588.86/623,920.60
  6. Step 6: Final answer
    x = 510,728.10

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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.