Home / 1,428,307.70-2,142,461.55-430,906.10

Finding the Fourth Proportional to 1,428,307.70, 2,142,461.55 and 430,906.10

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Solution

The fourth proportional to 1,428,307.70, 2,142,461.55 and 430,906.10 is: 646,359.15

Step by Step Solution

  1. Step 1: Write the proportion equation
    1,428,307.70 : 2,142,461.55 = 430,906.10 : x
  2. Step 2: Convert to fraction form
    1,428,307.70/2,142,461.55 = 430,906.10/x
  3. Step 3: Cross multiply
    1,428,307.70x = 2,142,461.55 × 430,906.10
  4. Step 4: Simplify right side
    1,428,307.70x = 923,199,750,910.46
  5. Step 5: Solve for x
    x = 923,199,750,910.46/1,428,307.70
  6. Step 6: Final answer
    x = 646,359.15

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Double scale
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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.