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Finding the Fourth Proportional to 638,139.70, 957,209.55 and 616,488.40

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Solution

The fourth proportional to 638,139.70, 957,209.55 and 616,488.40 is: 924,732.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    638,139.70 : 957,209.55 = 616,488.40 : x
  2. Step 2: Convert to fraction form
    638,139.70/957,209.55 = 616,488.40/x
  3. Step 3: Cross multiply
    638,139.70x = 957,209.55 × 616,488.40
  4. Step 4: Simplify right side
    638,139.70x = 590,108,583,944.22
  5. Step 5: Solve for x
    x = 590,108,583,944.22/638,139.70
  6. Step 6: Final answer
    x = 924,732.60

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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.