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Finding the Fourth Proportional to 572,148.40, 858,611.40 and 319,428.40

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Solution

The fourth proportional to 572,148.40, 858,611.40 and 319,428.40 is: 479,359.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    572,148.40 : 858,611.40 = 319,428.40 : x
  2. Step 2: Convert to fraction form
    572,148.40/858,611.40 = 319,428.40/x
  3. Step 3: Cross multiply
    572,148.40x = 858,611.40 × 319,428.40
  4. Step 4: Simplify right side
    572,148.40x = 274,264,865,723.76
  5. Step 5: Solve for x
    x = 274,264,865,723.76/572,148.40
  6. Step 6: Final answer
    x = 479,359.67

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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.