Home / 953,403.40-1,428,938.70-420,358.60

Finding the Fourth Proportional to 953,403.40, 1,428,938.70 and 420,358.60

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Solution

The fourth proportional to 953,403.40, 1,428,938.70 and 420,358.60 is: 630,023.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    953,403.40 : 1,428,938.70 = 420,358.60 : x
  2. Step 2: Convert to fraction form
    953,403.40/1,428,938.70 = 420,358.60/x
  3. Step 3: Cross multiply
    953,403.40x = 1,428,938.70 × 420,358.60
  4. Step 4: Simplify right side
    953,403.40x = 600,666,671,417.82
  5. Step 5: Solve for x
    x = 600,666,671,417.82/953,403.40
  6. Step 6: Final answer
    x = 630,023.63

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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.