Home / 280,688.09-387,345.03-153,360.95

Finding the Fourth Proportional to 280,688.09, 387,345.03 and 153,360.95

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Solution

The fourth proportional to 280,688.09, 387,345.03 and 153,360.95 is: 211,635.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,688.09 : 387,345.03 = 153,360.95 : x
  2. Step 2: Convert to fraction form
    280,688.09/387,345.03 = 153,360.95/x
  3. Step 3: Cross multiply
    280,688.09x = 387,345.03 × 153,360.95
  4. Step 4: Simplify right side
    280,688.09x = 59,403,599,841.85
  5. Step 5: Solve for x
    x = 59,403,599,841.85/280,688.09
  6. Step 6: Final answer
    x = 211,635.63

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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.