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Finding the Fourth Proportional to 644,718.02, 889,693.20 and 358,230.74

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Solution

The fourth proportional to 644,718.02, 889,693.20 and 358,230.74 is: 494,348.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,718.02 : 889,693.20 = 358,230.74 : x
  2. Step 2: Convert to fraction form
    644,718.02/889,693.20 = 358,230.74/x
  3. Step 3: Cross multiply
    644,718.02x = 889,693.20 × 358,230.74
  4. Step 4: Simplify right side
    644,718.02x = 318,715,448,960.50
  5. Step 5: Solve for x
    x = 318,715,448,960.50/644,718.02
  6. Step 6: Final answer
    x = 494,348.60

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Double scale
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Similar ratio
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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.