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Finding the Fourth Proportional to 645,424.68, 890,670.42 and 351,066.84

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Solution

The fourth proportional to 645,424.68, 890,670.42 and 351,066.84 is: 484,463.73

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,424.68 : 890,670.42 = 351,066.84 : x
  2. Step 2: Convert to fraction form
    645,424.68/890,670.42 = 351,066.84/x
  3. Step 3: Cross multiply
    645,424.68x = 890,670.42 × 351,066.84
  4. Step 4: Simplify right side
    645,424.68x = 312,684,849,830.87
  5. Step 5: Solve for x
    x = 312,684,849,830.87/645,424.68
  6. Step 6: Final answer
    x = 484,463.73

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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.