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Finding the Fourth Proportional to 616,986.40, 851,435.20 and 345,051.20

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Solution

The fourth proportional to 616,986.40, 851,435.20 and 345,051.20 is: 476,167.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    616,986.40 : 851,435.20 = 345,051.20 : x
  2. Step 2: Convert to fraction form
    616,986.40/851,435.20 = 345,051.20/x
  3. Step 3: Cross multiply
    616,986.40x = 851,435.20 × 345,051.20
  4. Step 4: Simplify right side
    616,986.40x = 293,788,737,482.24
  5. Step 5: Solve for x
    x = 293,788,737,482.24/616,986.40
  6. Step 6: Final answer
    x = 476,167.28

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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.