Home / 285,447.80-393,918.02-156,386.84

Finding the Fourth Proportional to 285,447.80, 393,918.02 and 156,386.84

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Solution

The fourth proportional to 285,447.80, 393,918.02 and 156,386.84 is: 215,813.87

Step by Step Solution

  1. Step 1: Write the proportion equation
    285,447.80 : 393,918.02 = 156,386.84 : x
  2. Step 2: Convert to fraction form
    285,447.80/393,918.02 = 156,386.84/x
  3. Step 3: Cross multiply
    285,447.80x = 393,918.02 × 156,386.84
  4. Step 4: Simplify right side
    285,447.80x = 61,603,594,366.86
  5. Step 5: Solve for x
    x = 61,603,594,366.86/285,447.80
  6. Step 6: Final answer
    x = 215,813.87

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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.