Home / 287,981.64-397,405.38-157,154.28

Finding the Fourth Proportional to 287,981.64, 397,405.38 and 157,154.28

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Solution

The fourth proportional to 287,981.64, 397,405.38 and 157,154.28 is: 216,867.84

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,981.64 : 397,405.38 = 157,154.28 : x
  2. Step 2: Convert to fraction form
    287,981.64/397,405.38 = 157,154.28/x
  3. Step 3: Cross multiply
    287,981.64x = 397,405.38 × 157,154.28
  4. Step 4: Simplify right side
    287,981.64x = 62,453,956,362.03
  5. Step 5: Solve for x
    x = 62,453,956,362.03/287,981.64
  6. Step 6: Final answer
    x = 216,867.84

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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.