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Finding the Fourth Proportional to 219,302.88, 302,605.40 and 128,624.64

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Solution

The fourth proportional to 219,302.88, 302,605.40 and 128,624.64 is: 177,482.90

Step by Step Solution

  1. Step 1: Write the proportion equation
    219,302.88 : 302,605.40 = 128,624.64 : x
  2. Step 2: Convert to fraction form
    219,302.88/302,605.40 = 128,624.64/x
  3. Step 3: Cross multiply
    219,302.88x = 302,605.40 × 128,624.64
  4. Step 4: Simplify right side
    219,302.88x = 38,922,510,637.06
  5. Step 5: Solve for x
    x = 38,922,510,637.06/219,302.88
  6. Step 6: Final answer
    x = 177,482.90

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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.