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Finding the Fourth Proportional to 412,666.60, 618,999.90 and 355,585.90

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Solution

The fourth proportional to 412,666.60, 618,999.90 and 355,585.90 is: 533,378.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    412,666.60 : 618,999.90 = 355,585.90 : x
  2. Step 2: Convert to fraction form
    412,666.60/618,999.90 = 355,585.90/x
  3. Step 3: Cross multiply
    412,666.60x = 618,999.90 × 355,585.90
  4. Step 4: Simplify right side
    412,666.60x = 220,107,636,541.41
  5. Step 5: Solve for x
    x = 220,107,636,541.41/412,666.60
  6. Step 6: Final answer
    x = 533,378.85

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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.