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Finding the Fourth Proportional to 495,438.01, 683,681.55 and 280,579.60

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Solution

The fourth proportional to 495,438.01, 683,681.55 and 280,579.60 is: 387,186.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,438.01 : 683,681.55 = 280,579.60 : x
  2. Step 2: Convert to fraction form
    495,438.01/683,681.55 = 280,579.60/x
  3. Step 3: Cross multiply
    495,438.01x = 683,681.55 × 280,579.60
  4. Step 4: Simplify right side
    495,438.01x = 191,827,095,826.38
  5. Step 5: Solve for x
    x = 191,827,095,826.38/495,438.01
  6. Step 6: Final answer
    x = 387,186.88

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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.