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Finding the Fourth Proportional to 489,974,649.80, 734,961,974.70 and 423,461,856.20

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Solution

The fourth proportional to 489,974,649.80, 734,961,974.70 and 423,461,856.20 is: 635,192,784.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    489,974,649.80 : 734,961,974.70 = 423,461,856.20 : x
  2. Step 2: Convert to fraction form
    489,974,649.80/734,961,974.70 = 423,461,856.20/x
  3. Step 3: Cross multiply
    489,974,649.80x = 734,961,974.70 × 423,461,856.20
  4. Step 4: Simplify right side
    489,974,649.80x = 311,228,362,042,879,424
  5. Step 5: Solve for x
    x = 311,228,362,042,879,424/489,974,649.80
  6. Step 6: Final answer
    x = 635,192,784.30

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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.