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Finding the Fourth Proportional to 280,802.99, 387,502.41 and 153,479.50

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Solution

The fourth proportional to 280,802.99, 387,502.41 and 153,479.50 is: 211,798.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    280,802.99 : 387,502.41 = 153,479.50 : x
  2. Step 2: Convert to fraction form
    280,802.99/387,502.41 = 153,479.50/x
  3. Step 3: Cross multiply
    280,802.99x = 387,502.41 × 153,479.50
  4. Step 4: Simplify right side
    280,802.99x = 59,473,676,135.60
  5. Step 5: Solve for x
    x = 59,473,676,135.60/280,802.99
  6. Step 6: Final answer
    x = 211,798.59

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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.