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Finding the Fourth Proportional to 665,728.71, 917,983.13 and 423,701.62

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Solution

The fourth proportional to 665,728.71, 917,983.13 and 423,701.62 is: 584,248.41

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,728.71 : 917,983.13 = 423,701.62 : x
  2. Step 2: Convert to fraction form
    665,728.71/917,983.13 = 423,701.62/x
  3. Step 3: Cross multiply
    665,728.71x = 917,983.13 × 423,701.62
  4. Step 4: Simplify right side
    665,728.71x = 388,950,934,900.21
  5. Step 5: Solve for x
    x = 388,950,934,900.21/665,728.71
  6. Step 6: Final answer
    x = 584,248.41

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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.