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Finding the Fourth Proportional to 346,710.62, 478,318.17 and 210,722.66

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Solution

The fourth proportional to 346,710.62, 478,318.17 and 210,722.66 is: 290,710.67

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,710.62 : 478,318.17 = 210,722.66 : x
  2. Step 2: Convert to fraction form
    346,710.62/478,318.17 = 210,722.66/x
  3. Step 3: Cross multiply
    346,710.62x = 478,318.17 × 210,722.66
  4. Step 4: Simplify right side
    346,710.62x = 100,792,477,108.73
  5. Step 5: Solve for x
    x = 100,792,477,108.73/346,710.62
  6. Step 6: Final answer
    x = 290,710.67

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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.