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Finding the Fourth Proportional to 245,444.70, 368,075.85 and 85,479.57

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Solution

The fourth proportional to 245,444.70, 368,075.85 and 85,479.57 is: 128,187.59

Step by Step Solution

  1. Step 1: Write the proportion equation
    245,444.70 : 368,075.85 = 85,479.57 : x
  2. Step 2: Convert to fraction form
    245,444.70/368,075.85 = 85,479.57/x
  3. Step 3: Cross multiply
    245,444.70x = 368,075.85 × 85,479.57
  4. Step 4: Simplify right side
    245,444.70x = 31,462,965,385.38
  5. Step 5: Solve for x
    x = 31,462,965,385.38/245,444.70
  6. Step 6: Final answer
    x = 128,187.59

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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.