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Finding the Fourth Proportional to 402,630.40, 602,390.40 and 262,662.40

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Solution

The fourth proportional to 402,630.40, 602,390.40 and 262,662.40 is: 392,979.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,630.40 : 602,390.40 = 262,662.40 : x
  2. Step 2: Convert to fraction form
    402,630.40/602,390.40 = 262,662.40/x
  3. Step 3: Cross multiply
    402,630.40x = 602,390.40 × 262,662.40
  4. Step 4: Simplify right side
    402,630.40x = 158,225,308,200.96
  5. Step 5: Solve for x
    x = 158,225,308,200.96/402,630.40
  6. Step 6: Final answer
    x = 392,979.04

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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.