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Finding the Fourth Proportional to 679,580.05, 937,730.21 and 421,362.81

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Solution

The fourth proportional to 679,580.05, 937,730.21 and 421,362.81 is: 581,424.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,580.05 : 937,730.21 = 421,362.81 : x
  2. Step 2: Convert to fraction form
    679,580.05/937,730.21 = 421,362.81/x
  3. Step 3: Cross multiply
    679,580.05x = 937,730.21 × 421,362.81
  4. Step 4: Simplify right side
    679,580.05x = 395,124,631,618.84
  5. Step 5: Solve for x
    x = 395,124,631,618.84/679,580.05
  6. Step 6: Final answer
    x = 581,424.71

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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.