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Finding the Fourth Proportional to 658,090.40, 986,905.20 and 342,442.40

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Solution

The fourth proportional to 658,090.40, 986,905.20 and 342,442.40 is: 513,543.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,090.40 : 986,905.20 = 342,442.40 : x
  2. Step 2: Convert to fraction form
    658,090.40/986,905.20 = 342,442.40/x
  3. Step 3: Cross multiply
    658,090.40x = 986,905.20 × 342,442.40
  4. Step 4: Simplify right side
    658,090.40x = 337,958,185,260.48
  5. Step 5: Solve for x
    x = 337,958,185,260.48/658,090.40
  6. Step 6: Final answer
    x = 513,543.71

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1.5x scale

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.