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Finding the Fourth Proportional to 265,259.28, 397,888.68 and 78,256.08

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Solution

The fourth proportional to 265,259.28, 397,888.68 and 78,256.08 is: 117,384.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    265,259.28 : 397,888.68 = 78,256.08 : x
  2. Step 2: Convert to fraction form
    265,259.28/397,888.68 = 78,256.08/x
  3. Step 3: Cross multiply
    265,259.28x = 397,888.68 × 78,256.08
  4. Step 4: Simplify right side
    265,259.28x = 31,137,208,373.17
  5. Step 5: Solve for x
    x = 31,137,208,373.17/265,259.28
  6. Step 6: Final answer
    x = 117,384.05

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1.5x scale

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.