Home / 645,903.32-890,841.66-419,621.72

Finding the Fourth Proportional to 645,903.32, 890,841.66 and 419,621.72

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Solution

The fourth proportional to 645,903.32, 890,841.66 and 419,621.72 is: 578,749.94

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,903.32 : 890,841.66 = 419,621.72 : x
  2. Step 2: Convert to fraction form
    645,903.32/890,841.66 = 419,621.72/x
  3. Step 3: Cross multiply
    645,903.32x = 890,841.66 × 419,621.72
  4. Step 4: Simplify right side
    645,903.32x = 373,816,509,616.86
  5. Step 5: Solve for x
    x = 373,816,509,616.86/645,903.32
  6. Step 6: Final answer
    x = 578,749.94

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.