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Finding the Fourth Proportional to 305,523.40, 421,526.90 and 176,445.32

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Solution

The fourth proportional to 305,523.40, 421,526.90 and 176,445.32 is: 243,439.45

Step by Step Solution

  1. Step 1: Write the proportion equation
    305,523.40 : 421,526.90 = 176,445.32 : x
  2. Step 2: Convert to fraction form
    305,523.40/421,526.90 = 176,445.32/x
  3. Step 3: Cross multiply
    305,523.40x = 421,526.90 × 176,445.32
  4. Step 4: Simplify right side
    305,523.40x = 74,376,448,759.11
  5. Step 5: Solve for x
    x = 74,376,448,759.11/305,523.40
  6. Step 6: Final answer
    x = 243,439.45

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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.