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Finding the Fourth Proportional to 620,748.30, 931,122.45 and 553,826.10

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Solution

The fourth proportional to 620,748.30, 931,122.45 and 553,826.10 is: 830,739.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    620,748.30 : 931,122.45 = 553,826.10 : x
  2. Step 2: Convert to fraction form
    620,748.30/931,122.45 = 553,826.10/x
  3. Step 3: Cross multiply
    620,748.30x = 931,122.45 × 553,826.10
  4. Step 4: Simplify right side
    620,748.30x = 515,679,915,105.95
  5. Step 5: Solve for x
    x = 515,679,915,105.95/620,748.30
  6. Step 6: Final answer
    x = 830,739.15

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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.