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Finding the Fourth Proportional to 612,666.79, 919,044.12 and 163,385.30

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Solution

The fourth proportional to 612,666.79, 919,044.12 and 163,385.30 is: 245,089.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    612,666.79 : 919,044.12 = 163,385.30 : x
  2. Step 2: Convert to fraction form
    612,666.79/919,044.12 = 163,385.30/x
  3. Step 3: Cross multiply
    612,666.79x = 919,044.12 × 163,385.30
  4. Step 4: Simplify right side
    612,666.79x = 150,158,299,259.44
  5. Step 5: Solve for x
    x = 150,158,299,259.44/612,666.79
  6. Step 6: Final answer
    x = 245,089.67

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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.