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Finding the Fourth Proportional to 665,008.50, 917,717.58 and 378,547.02

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Solution

The fourth proportional to 665,008.50, 917,717.58 and 378,547.02 is: 522,398.22

Step by Step Solution

  1. Step 1: Write the proportion equation
    665,008.50 : 917,717.58 = 378,547.02 : x
  2. Step 2: Convert to fraction form
    665,008.50/917,717.58 = 378,547.02/x
  3. Step 3: Cross multiply
    665,008.50x = 917,717.58 × 378,547.02
  4. Step 4: Simplify right side
    665,008.50x = 347,399,255,110.61
  5. Step 5: Solve for x
    x = 347,399,255,110.61/665,008.50
  6. Step 6: Final answer
    x = 522,398.22

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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.