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Finding the Fourth Proportional to 666,818.30, 920,218.54 and 376,446.20

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Solution

The fourth proportional to 666,818.30, 920,218.54 and 376,446.20 is: 519,501.00

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,818.30 : 920,218.54 = 376,446.20 : x
  2. Step 2: Convert to fraction form
    666,818.30/920,218.54 = 376,446.20/x
  3. Step 3: Cross multiply
    666,818.30x = 920,218.54 × 376,446.20
  4. Step 4: Simplify right side
    666,818.30x = 346,412,772,552.55
  5. Step 5: Solve for x
    x = 346,412,772,552.55/666,818.30
  6. Step 6: Final answer
    x = 519,501.00

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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.