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Finding the Fourth Proportional to 490,440, 731,368.20 and 485,955.84

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Solution

The fourth proportional to 490,440, 731,368.20 and 485,955.84 is: 724,681.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    490,440 : 731,368.20 = 485,955.84 : x
  2. Step 2: Convert to fraction form
    490,440/731,368.20 = 485,955.84/x
  3. Step 3: Cross multiply
    490,440x = 731,368.20 × 485,955.84
  4. Step 4: Simplify right side
    490,440x = 355,412,647,980.29
  5. Step 5: Solve for x
    x = 355,412,647,980.29/490,440
  6. Step 6: Final answer
    x = 724,681.20

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.49) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.