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Finding the Fourth Proportional to 645,794.56, 891,319.88 and 427,618.42

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Solution

The fourth proportional to 645,794.56, 891,319.88 and 427,618.42 is: 590,195.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,794.56 : 891,319.88 = 427,618.42 : x
  2. Step 2: Convert to fraction form
    645,794.56/891,319.88 = 427,618.42/x
  3. Step 3: Cross multiply
    645,794.56x = 891,319.88 × 427,618.42
  4. Step 4: Simplify right side
    645,794.56x = 381,144,798,800.19
  5. Step 5: Solve for x
    x = 381,144,798,800.19/645,794.56
  6. Step 6: Final answer
    x = 590,195.12

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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.