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Finding the Fourth Proportional to 253,254.40, 379,888 and 87,041.28

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Solution

The fourth proportional to 253,254.40, 379,888 and 87,041.28 is: 130,564.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    253,254.40 : 379,888 = 87,041.28 : x
  2. Step 2: Convert to fraction form
    253,254.40/379,888 = 87,041.28/x
  3. Step 3: Cross multiply
    253,254.40x = 379,888 × 87,041.28
  4. Step 4: Simplify right side
    253,254.40x = 33,065,937,776.64
  5. Step 5: Solve for x
    x = 33,065,937,776.64/253,254.40
  6. Step 6: Final answer
    x = 130,564.12

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.