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Finding the Fourth Proportional to 553,869.90, 830,792.70 and 154,499.40

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Solution

The fourth proportional to 553,869.90, 830,792.70 and 154,499.40 is: 231,745.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    553,869.90 : 830,792.70 = 154,499.40 : x
  2. Step 2: Convert to fraction form
    553,869.90/830,792.70 = 154,499.40/x
  3. Step 3: Cross multiply
    553,869.90x = 830,792.70 × 154,499.40
  4. Step 4: Simplify right side
    553,869.90x = 128,356,973,674.38
  5. Step 5: Solve for x
    x = 128,356,973,674.38/553,869.90
  6. Step 6: Final answer
    x = 231,745.71

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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.