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Finding the Fourth Proportional to 402,420.60, 603,412.20 and 165,787.20

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Solution

The fourth proportional to 402,420.60, 603,412.20 and 165,787.20 is: 248,590.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    402,420.60 : 603,412.20 = 165,787.20 : x
  2. Step 2: Convert to fraction form
    402,420.60/603,412.20 = 165,787.20/x
  3. Step 3: Cross multiply
    402,420.60x = 603,412.20 × 165,787.20
  4. Step 4: Simplify right side
    402,420.60x = 100,038,019,083.84
  5. Step 5: Solve for x
    x = 100,038,019,083.84/402,420.60
  6. Step 6: Final answer
    x = 248,590.70

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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.