Home / 280,712.07-387,385.38-153,390.39

Finding the Fourth Proportional to 280,712.07, 387,385.38 and 153,390.39

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Solution

The fourth proportional to 280,712.07, 387,385.38 and 153,390.39 is: 211,680.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,712.07 : 387,385.38 = 153,390.39 : x
  2. Step 2: Convert to fraction form
    280,712.07/387,385.38 = 153,390.39/x
  3. Step 3: Cross multiply
    280,712.07x = 387,385.38 × 153,390.39
  4. Step 4: Simplify right side
    280,712.07x = 59,421,194,518.50
  5. Step 5: Solve for x
    x = 59,421,194,518.50/280,712.07
  6. Step 6: Final answer
    x = 211,680.23

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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.