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Finding the Fourth Proportional to 578,312.40, 866,302.20 and 328,702.80

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Solution

The fourth proportional to 578,312.40, 866,302.20 and 328,702.80 is: 492,391.24

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,312.40 : 866,302.20 = 328,702.80 : x
  2. Step 2: Convert to fraction form
    578,312.40/866,302.20 = 328,702.80/x
  3. Step 3: Cross multiply
    578,312.40x = 866,302.20 × 328,702.80
  4. Step 4: Simplify right side
    578,312.40x = 284,755,958,786.16
  5. Step 5: Solve for x
    x = 284,755,958,786.16/578,312.40
  6. Step 6: Final answer
    x = 492,391.24

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.