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Finding the Fourth Proportional to 280,802.59, 387,501.86 and 153,479.09

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Solution

The fourth proportional to 280,802.59, 387,501.86 and 153,479.09 is: 211,798.03

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,802.59 : 387,501.86 = 153,479.09 : x
  2. Step 2: Convert to fraction form
    280,802.59/387,501.86 = 153,479.09/x
  3. Step 3: Cross multiply
    280,802.59x = 387,501.86 × 153,479.09
  4. Step 4: Simplify right side
    280,802.59x = 59,473,434,198.56
  5. Step 5: Solve for x
    x = 59,473,434,198.56/280,802.59
  6. Step 6: Final answer
    x = 211,798.03

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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.