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Finding the Fourth Proportional to 644,288.15, 889,119.72 and 357,808.24

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Solution

The fourth proportional to 644,288.15, 889,119.72 and 357,808.24 is: 493,776.52

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,288.15 : 889,119.72 = 357,808.24 : x
  2. Step 2: Convert to fraction form
    644,288.15/889,119.72 = 357,808.24/x
  3. Step 3: Cross multiply
    644,288.15x = 889,119.72 × 357,808.24
  4. Step 4: Simplify right side
    644,288.15x = 318,134,359,782.10
  5. Step 5: Solve for x
    x = 318,134,359,782.10/644,288.15
  6. Step 6: Final answer
    x = 493,776.52

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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.