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Finding the Fourth Proportional to 607,615.20, 911,336.40 and 208,274.40

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Solution

The fourth proportional to 607,615.20, 911,336.40 and 208,274.40 is: 312,381.98

Step by Step Solution

  1. Step 1: Write the proportion equation
    607,615.20 : 911,336.40 = 208,274.40 : x
  2. Step 2: Convert to fraction form
    607,615.20/911,336.40 = 208,274.40/x
  3. Step 3: Cross multiply
    607,615.20x = 911,336.40 × 208,274.40
  4. Step 4: Simplify right side
    607,615.20x = 189,808,041,908.16
  5. Step 5: Solve for x
    x = 189,808,041,908.16/607,615.20
  6. Step 6: Final answer
    x = 312,381.98

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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.