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Finding the Fourth Proportional to 658,153.40, 986,999.70 and 342,505.40

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Solution

The fourth proportional to 658,153.40, 986,999.70 and 342,505.40 is: 513,638.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    658,153.40 : 986,999.70 = 342,505.40 : x
  2. Step 2: Convert to fraction form
    658,153.40/986,999.70 = 342,505.40/x
  3. Step 3: Cross multiply
    658,153.40x = 986,999.70 × 342,505.40
  4. Step 4: Simplify right side
    658,153.40x = 338,052,727,048.38
  5. Step 5: Solve for x
    x = 338,052,727,048.38/658,153.40
  6. Step 6: Final answer
    x = 513,638.20

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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.