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Finding the Fourth Proportional to 980,164.40, 1,369,430.80 and 980,164.40

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Solution

The fourth proportional to 980,164.40, 1,369,430.80 and 980,164.40 is: 1,369,430.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    980,164.40 : 1,369,430.80 = 980,164.40 : x
  2. Step 2: Convert to fraction form
    980,164.40/1,369,430.80 = 980,164.40/x
  3. Step 3: Cross multiply
    980,164.40x = 1,369,430.80 × 980,164.40
  4. Step 4: Simplify right side
    980,164.40x = 1,342,267,318,423.52
  5. Step 5: Solve for x
    x = 1,342,267,318,423.52/980,164.40
  6. Step 6: Final answer
    x = 1,369,430.80

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.40) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.