Home / 420,281,354.70-628,721,420.85-369,263,018.70

Finding the Fourth Proportional to 420,281,354.70, 628,721,420.85 and 369,263,018.70

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Solution

The fourth proportional to 420,281,354.70, 628,721,420.85 and 369,263,018.70 is: 552,400,355.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    420,281,354.70 : 628,721,420.85 = 369,263,018.70 : x
  2. Step 2: Convert to fraction form
    420,281,354.70/628,721,420.85 = 369,263,018.70/x
  3. Step 3: Cross multiply
    420,281,354.70x = 628,721,420.85 × 369,263,018.70
  4. Step 4: Simplify right side
    420,281,354.70x = 232,163,569,784,424,128
  5. Step 5: Solve for x
    x = 232,163,569,784,424,128/420,281,354.70
  6. Step 6: Final answer
    x = 552,400,355.59

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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.