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Finding the Fourth Proportional to 495,718.53, 684,089.19 and 280,858.17

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Solution

The fourth proportional to 495,718.53, 684,089.19 and 280,858.17 is: 387,582.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    495,718.53 : 684,089.19 = 280,858.17 : x
  2. Step 2: Convert to fraction form
    495,718.53/684,089.19 = 280,858.17/x
  3. Step 3: Cross multiply
    495,718.53x = 684,089.19 × 280,858.17
  4. Step 4: Simplify right side
    495,718.53x = 192,132,038,020.18
  5. Step 5: Solve for x
    x = 192,132,038,020.18/495,718.53
  6. Step 6: Final answer
    x = 387,582.93

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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.