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Finding the Fourth Proportional to 495,867.40, 744,578.70 and 285,915.40

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Solution

The fourth proportional to 495,867.40, 744,578.70 and 285,915.40 is: 429,321.46

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,867.40 : 744,578.70 = 285,915.40 : x
  2. Step 2: Convert to fraction form
    495,867.40/744,578.70 = 285,915.40/x
  3. Step 3: Cross multiply
    495,867.40x = 744,578.70 × 285,915.40
  4. Step 4: Simplify right side
    495,867.40x = 212,886,516,841.98
  5. Step 5: Solve for x
    x = 212,886,516,841.98/495,867.40
  6. Step 6: Final answer
    x = 429,321.46

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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.