Home / 678,281.40-1,017,422.10-521,302.20

Finding the Fourth Proportional to 678,281.40, 1,017,422.10 and 521,302.20

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Solution

The fourth proportional to 678,281.40, 1,017,422.10 and 521,302.20 is: 781,953.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    678,281.40 : 1,017,422.10 = 521,302.20 : x
  2. Step 2: Convert to fraction form
    678,281.40/1,017,422.10 = 521,302.20/x
  3. Step 3: Cross multiply
    678,281.40x = 1,017,422.10 × 521,302.20
  4. Step 4: Simplify right side
    678,281.40x = 530,384,379,058.62
  5. Step 5: Solve for x
    x = 530,384,379,058.62/678,281.40
  6. Step 6: Final answer
    x = 781,953.30

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Double scale
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Similar ratio
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1.5x scale

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.