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Finding the Fourth Proportional to 346,491, 478,157.58 and 187,515

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Solution

The fourth proportional to 346,491, 478,157.58 and 187,515 is: 258,770.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,491 : 478,157.58 = 187,515 : x
  2. Step 2: Convert to fraction form
    346,491/478,157.58 = 187,515/x
  3. Step 3: Cross multiply
    346,491x = 478,157.58 × 187,515
  4. Step 4: Simplify right side
    346,491x = 89,661,718,613.70
  5. Step 5: Solve for x
    x = 89,661,718,613.70/346,491
  6. Step 6: Final answer
    x = 258,770.70

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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.