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Finding the Fourth Proportional to 644,280.44, 889,082.65 and 357,818.97

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Solution

The fourth proportional to 644,280.44, 889,082.65 and 357,818.97 is: 493,776.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,280.44 : 889,082.65 = 357,818.97 : x
  2. Step 2: Convert to fraction form
    644,280.44/889,082.65 = 357,818.97/x
  3. Step 3: Cross multiply
    644,280.44x = 889,082.65 × 357,818.97
  4. Step 4: Simplify right side
    644,280.44x = 318,130,637,173.32
  5. Step 5: Solve for x
    x = 318,130,637,173.32/644,280.44
  6. Step 6: Final answer
    x = 493,776.65

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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.