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Finding the Fourth Proportional to 289,617,943.80, 434,426,915.70 and 289,617,943.80

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Solution

The fourth proportional to 289,617,943.80, 434,426,915.70 and 289,617,943.80 is: 434,426,915.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,617,943.80 : 434,426,915.70 = 289,617,943.80 : x
  2. Step 2: Convert to fraction form
    289,617,943.80/434,426,915.70 = 289,617,943.80/x
  3. Step 3: Cross multiply
    289,617,943.80x = 434,426,915.70 × 289,617,943.80
  4. Step 4: Simplify right side
    289,617,943.80x = 125,817,830,056,409,936
  5. Step 5: Solve for x
    x = 125,817,830,056,409,936/289,617,943.80
  6. Step 6: Final answer
    x = 434,426,915.70

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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.