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Finding the Fourth Proportional to 225,302.58, 310,905.21 and 128,492.22

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Solution

The fourth proportional to 225,302.58, 310,905.21 and 128,492.22 is: 177,312.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    225,302.58 : 310,905.21 = 128,492.22 : x
  2. Step 2: Convert to fraction form
    225,302.58/310,905.21 = 128,492.22/x
  3. Step 3: Cross multiply
    225,302.58x = 310,905.21 × 128,492.22
  4. Step 4: Simplify right side
    225,302.58x = 39,948,900,642.47
  5. Step 5: Solve for x
    x = 39,948,900,642.47/225,302.58
  6. Step 6: Final answer
    x = 177,312.22

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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.