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Finding the Fourth Proportional to 666,935.76, 920,393.80 and 365,136.08

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Solution

The fourth proportional to 666,935.76, 920,393.80 and 365,136.08 is: 503,900.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    666,935.76 : 920,393.80 = 365,136.08 : x
  2. Step 2: Convert to fraction form
    666,935.76/920,393.80 = 365,136.08/x
  3. Step 3: Cross multiply
    666,935.76x = 920,393.80 × 365,136.08
  4. Step 4: Simplify right side
    666,935.76x = 336,068,984,188.30
  5. Step 5: Solve for x
    x = 336,068,984,188.30/666,935.76
  6. Step 6: Final answer
    x = 503,900.08

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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.