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Finding the Fourth Proportional to 570,454.39, 787,195.84 and 312,281.40

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Solution

The fourth proportional to 570,454.39, 787,195.84 and 312,281.40 is: 430,931.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    570,454.39 : 787,195.84 = 312,281.40 : x
  2. Step 2: Convert to fraction form
    570,454.39/787,195.84 = 312,281.40/x
  3. Step 3: Cross multiply
    570,454.39x = 787,195.84 × 312,281.40
  4. Step 4: Simplify right side
    570,454.39x = 245,826,618,208.67
  5. Step 5: Solve for x
    x = 245,826,618,208.67/570,454.39
  6. Step 6: Final answer
    x = 430,931.24

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.