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Finding the Fourth Proportional to 666,407.38, 918,685.63 and 475,088.62

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Solution

The fourth proportional to 666,407.38, 918,685.63 and 475,088.62 is: 654,940.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,407.38 : 918,685.63 = 475,088.62 : x
  2. Step 2: Convert to fraction form
    666,407.38/918,685.63 = 475,088.62/x
  3. Step 3: Cross multiply
    666,407.38x = 918,685.63 × 475,088.62
  4. Step 4: Simplify right side
    666,407.38x = 436,457,088,170.53
  5. Step 5: Solve for x
    x = 436,457,088,170.53/666,407.38
  6. Step 6: Final answer
    x = 654,940.36

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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.