Home / 280,400.18-386,950.28-153,075.78

Finding the Fourth Proportional to 280,400.18, 386,950.28 and 153,075.78

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Solution

The fourth proportional to 280,400.18, 386,950.28 and 153,075.78 is: 211,243.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,400.18 : 386,950.28 = 153,075.78 : x
  2. Step 2: Convert to fraction form
    280,400.18/386,950.28 = 153,075.78/x
  3. Step 3: Cross multiply
    280,400.18x = 386,950.28 × 153,075.78
  4. Step 4: Simplify right side
    280,400.18x = 59,232,715,370.12
  5. Step 5: Solve for x
    x = 59,232,715,370.12/280,400.18
  6. Step 6: Final answer
    x = 211,243.50

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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.