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Finding the Fourth Proportional to 346,755.79, 478,387.81 and 217,618.90

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Solution

The fourth proportional to 346,755.79, 478,387.81 and 217,618.90 is: 300,229.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,755.79 : 478,387.81 = 217,618.90 : x
  2. Step 2: Convert to fraction form
    346,755.79/478,387.81 = 217,618.90/x
  3. Step 3: Cross multiply
    346,755.79x = 478,387.81 × 217,618.90
  4. Step 4: Simplify right side
    346,755.79x = 104,106,228,985.61
  5. Step 5: Solve for x
    x = 104,106,228,985.61/346,755.79
  6. Step 6: Final answer
    x = 300,229.24

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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.