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Finding the Fourth Proportional to 530,836.40, 794,310.60 and 390,868.40

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Solution

The fourth proportional to 530,836.40, 794,310.60 and 390,868.40 is: 584,871.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,836.40 : 794,310.60 = 390,868.40 : x
  2. Step 2: Convert to fraction form
    530,836.40/794,310.60 = 390,868.40/x
  3. Step 3: Cross multiply
    530,836.40x = 794,310.60 × 390,868.40
  4. Step 4: Simplify right side
    530,836.40x = 310,470,913,325.04
  5. Step 5: Solve for x
    x = 310,470,913,325.04/530,836.40
  6. Step 6: Final answer
    x = 584,871.18

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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.