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Finding the Fourth Proportional to 561,802.50, 775,287.72 and 307,155.78

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Solution

The fourth proportional to 561,802.50, 775,287.72 and 307,155.78 is: 423,875.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,802.50 : 775,287.72 = 307,155.78 : x
  2. Step 2: Convert to fraction form
    561,802.50/775,287.72 = 307,155.78/x
  3. Step 3: Cross multiply
    561,802.50x = 775,287.72 × 307,155.78
  4. Step 4: Simplify right side
    561,802.50x = 238,134,104,361.02
  5. Step 5: Solve for x
    x = 238,134,104,361.02/561,802.50
  6. Step 6: Final answer
    x = 423,875.12

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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.