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Finding the Fourth Proportional to 423,034.38, 634,717.71 and 186,211.02

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Solution

The fourth proportional to 423,034.38, 634,717.71 and 186,211.02 is: 279,389.66

Step by Step Solution

  1. Step 1: Write the proportion equation
    423,034.38 : 634,717.71 = 186,211.02 : x
  2. Step 2: Convert to fraction form
    423,034.38/634,717.71 = 186,211.02/x
  3. Step 3: Cross multiply
    423,034.38x = 634,717.71 × 186,211.02
  4. Step 4: Simplify right side
    423,034.38x = 118,191,432,191.16
  5. Step 5: Solve for x
    x = 118,191,432,191.16/423,034.38
  6. Step 6: Final answer
    x = 279,389.66

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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.