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Finding the Fourth Proportional to 402,156.30, 603,234.45 and 165,420.30

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Solution

The fourth proportional to 402,156.30, 603,234.45 and 165,420.30 is: 248,130.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,156.30 : 603,234.45 = 165,420.30 : x
  2. Step 2: Convert to fraction form
    402,156.30/603,234.45 = 165,420.30/x
  3. Step 3: Cross multiply
    402,156.30x = 603,234.45 × 165,420.30
  4. Step 4: Simplify right side
    402,156.30x = 99,787,223,689.34
  5. Step 5: Solve for x
    x = 99,787,223,689.34/402,156.30
  6. Step 6: Final answer
    x = 248,130.45

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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.