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Finding the Fourth Proportional to 691,417.50, 954,156.15 and 389,622.30

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Solution

The fourth proportional to 691,417.50, 954,156.15 and 389,622.30 is: 537,678.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    691,417.50 : 954,156.15 = 389,622.30 : x
  2. Step 2: Convert to fraction form
    691,417.50/954,156.15 = 389,622.30/x
  3. Step 3: Cross multiply
    691,417.50x = 954,156.15 × 389,622.30
  4. Step 4: Simplify right side
    691,417.50x = 371,760,513,722.15
  5. Step 5: Solve for x
    x = 371,760,513,722.15/691,417.50
  6. Step 6: Final answer
    x = 537,678.77

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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.