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Finding the Fourth Proportional to 346,523.62, 478,670.65 and 261,128.11

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Solution

The fourth proportional to 346,523.62, 478,670.65 and 261,128.11 is: 360,709.49

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,523.62 : 478,670.65 = 261,128.11 : x
  2. Step 2: Convert to fraction form
    346,523.62/478,670.65 = 261,128.11/x
  3. Step 3: Cross multiply
    346,523.62x = 478,670.65 × 261,128.11
  4. Step 4: Simplify right side
    346,523.62x = 124,994,358,447.98
  5. Step 5: Solve for x
    x = 124,994,358,447.98/346,523.62
  6. Step 6: Final answer
    x = 360,709.49

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1.5x scale

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.