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Finding the Fourth Proportional to 289,272.80, 399,184.72 and 168,417.60

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Solution

The fourth proportional to 289,272.80, 399,184.72 and 168,417.60 is: 232,409.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    289,272.80 : 399,184.72 = 168,417.60 : x
  2. Step 2: Convert to fraction form
    289,272.80/399,184.72 = 168,417.60/x
  3. Step 3: Cross multiply
    289,272.80x = 399,184.72 × 168,417.60
  4. Step 4: Simplify right side
    289,272.80x = 67,229,732,499.07
  5. Step 5: Solve for x
    x = 67,229,732,499.07/289,272.80
  6. Step 6: Final answer
    x = 232,409.45

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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.