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Finding the Fourth Proportional to 423,365.70, 634,883.07 and 153,429.78

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Solution

The fourth proportional to 423,365.70, 634,883.07 and 153,429.78 is: 230,084.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,365.70 : 634,883.07 = 153,429.78 : x
  2. Step 2: Convert to fraction form
    423,365.70/634,883.07 = 153,429.78/x
  3. Step 3: Cross multiply
    423,365.70x = 634,883.07 × 153,429.78
  4. Step 4: Simplify right side
    423,365.70x = 97,409,969,755.82
  5. Step 5: Solve for x
    x = 97,409,969,755.82/423,365.70
  6. Step 6: Final answer
    x = 230,084.70

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1.5x scale

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.