Home / 679,936.18-938,312.88-378,130.18

Finding the Fourth Proportional to 679,936.18, 938,312.88 and 378,130.18

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Solution

The fourth proportional to 679,936.18, 938,312.88 and 378,130.18 is: 521,820.18

Step by Step Solution

  1. Step 1: Write the proportion equation
    679,936.18 : 938,312.88 = 378,130.18 : x
  2. Step 2: Convert to fraction form
    679,936.18/938,312.88 = 378,130.18/x
  3. Step 3: Cross multiply
    679,936.18x = 938,312.88 × 378,130.18
  4. Step 4: Simplify right side
    679,936.18x = 354,804,418,210.72
  5. Step 5: Solve for x
    x = 354,804,418,210.72/679,936.18
  6. Step 6: Final answer
    x = 521,820.18

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Half scale
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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 (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.