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Finding the Fourth Proportional to 307,884.40, 425,173.90 and 291,111.02

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Solution

The fourth proportional to 307,884.40, 425,173.90 and 291,111.02 is: 402,010.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    307,884.40 : 425,173.90 = 291,111.02 : x
  2. Step 2: Convert to fraction form
    307,884.40/425,173.90 = 291,111.02/x
  3. Step 3: Cross multiply
    307,884.40x = 425,173.90 × 291,111.02
  4. Step 4: Simplify right side
    307,884.40x = 123,772,807,706.38
  5. Step 5: Solve for x
    x = 123,772,807,706.38/307,884.40
  6. Step 6: Final answer
    x = 402,010.65

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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.