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Finding the Fourth Proportional to 371,291.80, 556,937.70 and 90,805.40

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Solution

The fourth proportional to 371,291.80, 556,937.70 and 90,805.40 is: 136,208.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    371,291.80 : 556,937.70 = 90,805.40 : x
  2. Step 2: Convert to fraction form
    371,291.80/556,937.70 = 90,805.40/x
  3. Step 3: Cross multiply
    371,291.80x = 556,937.70 × 90,805.40
  4. Step 4: Simplify right side
    371,291.80x = 50,572,950,623.58
  5. Step 5: Solve for x
    x = 50,572,950,623.58/371,291.80
  6. Step 6: Final answer
    x = 136,208.10

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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.