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Finding the Fourth Proportional to 665,515.71, 918,411.62 and 363,709.71

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Solution

The fourth proportional to 665,515.71, 918,411.62 and 363,709.71 is: 501,919.36

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,515.71 : 918,411.62 = 363,709.71 : x
  2. Step 2: Convert to fraction form
    665,515.71/918,411.62 = 363,709.71/x
  3. Step 3: Cross multiply
    665,515.71x = 918,411.62 × 363,709.71
  4. Step 4: Simplify right side
    665,515.71x = 334,035,222,152.28
  5. Step 5: Solve for x
    x = 334,035,222,152.28/665,515.71
  6. Step 6: Final answer
    x = 501,919.36

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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.