Home / 287,939-397,356.18-160,622.66

Finding the Fourth Proportional to 287,939, 397,356.18 and 160,622.66

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Solution

The fourth proportional to 287,939, 397,356.18 and 160,622.66 is: 221,659.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    287,939 : 397,356.18 = 160,622.66 : x
  2. Step 2: Convert to fraction form
    287,939/397,356.18 = 160,622.66/x
  3. Step 3: Cross multiply
    287,939x = 397,356.18 × 160,622.66
  4. Step 4: Simplify right side
    287,939x = 63,824,406,599.04
  5. Step 5: Solve for x
    x = 63,824,406,599.04/287,939
  6. Step 6: Final answer
    x = 221,659.47

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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.