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Finding the Fourth Proportional to 666,681.68, 920,108.76 and 376,351.76

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Solution

The fourth proportional to 666,681.68, 920,108.76 and 376,351.76 is: 519,415.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,681.68 : 920,108.76 = 376,351.76 : x
  2. Step 2: Convert to fraction form
    666,681.68/920,108.76 = 376,351.76/x
  3. Step 3: Cross multiply
    666,681.68x = 920,108.76 × 376,351.76
  4. Step 4: Simplify right side
    666,681.68x = 346,284,551,217.42
  5. Step 5: Solve for x
    x = 346,284,551,217.42/666,681.68
  6. Step 6: Final answer
    x = 519,415.13

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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.