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Finding the Fourth Proportional to 455,106.32, 628,061.80 and 248,386

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Solution

The fourth proportional to 455,106.32, 628,061.80 and 248,386 is: 342,780.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,106.32 : 628,061.80 = 248,386 : x
  2. Step 2: Convert to fraction form
    455,106.32/628,061.80 = 248,386/x
  3. Step 3: Cross multiply
    455,106.32x = 628,061.80 × 248,386
  4. Step 4: Simplify right side
    455,106.32x = 156,001,758,254.80
  5. Step 5: Solve for x
    x = 156,001,758,254.80/455,106.32
  6. Step 6: Final answer
    x = 342,780.91

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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.