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Finding the Fourth Proportional to 644,290.15, 889,122.48 and 357,810.24

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Solution

The fourth proportional to 644,290.15, 889,122.48 and 357,810.24 is: 493,779.28

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,290.15 : 889,122.48 = 357,810.24 : x
  2. Step 2: Convert to fraction form
    644,290.15/889,122.48 = 357,810.24/x
  3. Step 3: Cross multiply
    644,290.15x = 889,122.48 × 357,810.24
  4. Step 4: Simplify right side
    644,290.15x = 318,137,127,958.20
  5. Step 5: Solve for x
    x = 318,137,127,958.20/644,290.15
  6. Step 6: Final answer
    x = 493,779.28

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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.