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Finding the Fourth Proportional to 346,660, 478,393.98 and 203,422.36

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Solution

The fourth proportional to 346,660, 478,393.98 and 203,422.36 is: 280,724.72

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,660 : 478,393.98 = 203,422.36 : x
  2. Step 2: Convert to fraction form
    346,660/478,393.98 = 203,422.36/x
  3. Step 3: Cross multiply
    346,660x = 478,393.98 × 203,422.36
  4. Step 4: Simplify right side
    346,660x = 97,316,032,421.39
  5. Step 5: Solve for x
    x = 97,316,032,421.39/346,660
  6. Step 6: Final answer
    x = 280,724.72

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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.