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Finding the Fourth Proportional to 603,835,217.40, 905,752,826.10 and 386,156,983.80

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Solution

The fourth proportional to 603,835,217.40, 905,752,826.10 and 386,156,983.80 is: 579,235,475.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    603,835,217.40 : 905,752,826.10 = 386,156,983.80 : x
  2. Step 2: Convert to fraction form
    603,835,217.40/905,752,826.10 = 386,156,983.80/x
  3. Step 3: Cross multiply
    603,835,217.40x = 905,752,826.10 × 386,156,983.80
  4. Step 4: Simplify right side
    603,835,217.40x = 349,762,779,395,101,952
  5. Step 5: Solve for x
    x = 349,762,779,395,101,952/603,835,217.40
  6. Step 6: Final answer
    x = 579,235,475.70

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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.