Home / 287,981.28-397,416.40-160,636.32

Finding the Fourth Proportional to 287,981.28, 397,416.40 and 160,636.32

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Solution

The fourth proportional to 287,981.28, 397,416.40 and 160,636.32 is: 221,679.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,981.28 : 397,416.40 = 160,636.32 : x
  2. Step 2: Convert to fraction form
    287,981.28/397,416.40 = 160,636.32/x
  3. Step 3: Cross multiply
    287,981.28x = 397,416.40 × 160,636.32
  4. Step 4: Simplify right side
    287,981.28x = 63,839,508,003.65
  5. Step 5: Solve for x
    x = 63,839,508,003.65/287,981.28
  6. Step 6: Final answer
    x = 221,679.37

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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.