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Finding the Fourth Proportional to 289,733.20, 392,539.50 and 289,733.20

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Solution

The fourth proportional to 289,733.20, 392,539.50 and 289,733.20 is: 392,539.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,733.20 : 392,539.50 = 289,733.20 : x
  2. Step 2: Convert to fraction form
    289,733.20/392,539.50 = 289,733.20/x
  3. Step 3: Cross multiply
    289,733.20x = 392,539.50 × 289,733.20
  4. Step 4: Simplify right side
    289,733.20x = 113,731,725,461.40
  5. Step 5: Solve for x
    x = 113,731,725,461.40/289,733.20
  6. Step 6: Final answer
    x = 392,539.50

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.35) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.