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Finding the Fourth Proportional to 666,895.38, 920,064.40 and 437,579.25

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Solution

The fourth proportional to 666,895.38, 920,064.40 and 437,579.25 is: 603,694.53

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,895.38 : 920,064.40 = 437,579.25 : x
  2. Step 2: Convert to fraction form
    666,895.38/920,064.40 = 437,579.25/x
  3. Step 3: Cross multiply
    666,895.38x = 920,064.40 × 437,579.25
  4. Step 4: Simplify right side
    666,895.38x = 402,601,088,020.89
  5. Step 5: Solve for x
    x = 402,601,088,020.89/666,895.38
  6. Step 6: Final answer
    x = 603,694.53

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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.