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Finding the Fourth Proportional to 500,312.84, 690,431.94 and 270,870.12

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Solution

The fourth proportional to 500,312.84, 690,431.94 and 270,870.12 is: 373,800.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    500,312.84 : 690,431.94 = 270,870.12 : x
  2. Step 2: Convert to fraction form
    500,312.84/690,431.94 = 270,870.12/x
  3. Step 3: Cross multiply
    500,312.84x = 690,431.94 × 270,870.12
  4. Step 4: Simplify right side
    500,312.84x = 187,017,382,439.63
  5. Step 5: Solve for x
    x = 187,017,382,439.63/500,312.84
  6. Step 6: Final answer
    x = 373,800.89

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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.