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Finding the Fourth Proportional to 716,900.85, 989,417.64 and 430,439.39

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Solution

The fourth proportional to 716,900.85, 989,417.64 and 430,439.39 is: 594,063.07

Step by Step Solution

  1. Step 1: Write the proportion equation
    716,900.85 : 989,417.64 = 430,439.39 : x
  2. Step 2: Convert to fraction form
    716,900.85/989,417.64 = 430,439.39/x
  3. Step 3: Cross multiply
    716,900.85x = 989,417.64 × 430,439.39
  4. Step 4: Simplify right side
    716,900.85x = 425,884,320,469.75
  5. Step 5: Solve for x
    x = 425,884,320,469.75/716,900.85
  6. Step 6: Final answer
    x = 594,063.07

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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.