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Finding the Fourth Proportional to 495,538.72, 683,824.08 and 280,690.72

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Solution

The fourth proportional to 495,538.72, 683,824.08 and 280,690.72 is: 387,342.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,538.72 : 683,824.08 = 280,690.72 : x
  2. Step 2: Convert to fraction form
    495,538.72/683,824.08 = 280,690.72/x
  3. Step 3: Cross multiply
    495,538.72x = 683,824.08 × 280,690.72
  4. Step 4: Simplify right side
    495,538.72x = 191,943,073,368.54
  5. Step 5: Solve for x
    x = 191,943,073,368.54/495,538.72
  6. Step 6: Final answer
    x = 387,342.23

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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.