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Finding the Fourth Proportional to 724,709.26, 1,000,191.06 and 438,231.40

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Solution

The fourth proportional to 724,709.26, 1,000,191.06 and 438,231.40 is: 604,815.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    724,709.26 : 1,000,191.06 = 438,231.40 : x
  2. Step 2: Convert to fraction form
    724,709.26/1,000,191.06 = 438,231.40/x
  3. Step 3: Cross multiply
    724,709.26x = 1,000,191.06 × 438,231.40
  4. Step 4: Simplify right side
    724,709.26x = 438,315,128,491.28
  5. Step 5: Solve for x
    x = 438,315,128,491.28/724,709.26
  6. Step 6: Final answer
    x = 604,815.13

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.