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Finding the Fourth Proportional to 561,957.76, 775,501.68 and 307,309.12

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Solution

The fourth proportional to 561,957.76, 775,501.68 and 307,309.12 is: 424,086.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    561,957.76 : 775,501.68 = 307,309.12 : x
  2. Step 2: Convert to fraction form
    561,957.76/775,501.68 = 307,309.12/x
  3. Step 3: Cross multiply
    561,957.76x = 775,501.68 × 307,309.12
  4. Step 4: Simplify right side
    561,957.76x = 238,318,738,839.32
  5. Step 5: Solve for x
    x = 238,318,738,839.32/561,957.76
  6. Step 6: Final answer
    x = 424,086.57

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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.