Home / 280,686.74-387,343.14-153,359.60

Finding the Fourth Proportional to 280,686.74, 387,343.14 and 153,359.60

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Solution

The fourth proportional to 280,686.74, 387,343.14 and 153,359.60 is: 211,633.76

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,686.74 : 387,343.14 = 153,359.60 : x
  2. Step 2: Convert to fraction form
    280,686.74/387,343.14 = 153,359.60/x
  3. Step 3: Cross multiply
    280,686.74x = 387,343.14 × 153,359.60
  4. Step 4: Simplify right side
    280,686.74x = 59,402,789,013.14
  5. Step 5: Solve for x
    x = 59,402,789,013.14/280,686.74
  6. Step 6: Final answer
    x = 211,633.76

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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.