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Finding the Fourth Proportional to 917,886.40, 1,376,295 and 356,264.80

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Solution

The fourth proportional to 917,886.40, 1,376,295 and 356,264.80 is: 534,189.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,886.40 : 1,376,295 = 356,264.80 : x
  2. Step 2: Convert to fraction form
    917,886.40/1,376,295 = 356,264.80/x
  3. Step 3: Cross multiply
    917,886.40x = 1,376,295 × 356,264.80
  4. Step 4: Simplify right side
    917,886.40x = 490,325,462,916
  5. Step 5: Solve for x
    x = 490,325,462,916/917,886.40
  6. Step 6: Final answer
    x = 534,189.70

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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.