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Finding the Fourth Proportional to 644,400.15, 889,294.51 and 357,946.89

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Solution

The fourth proportional to 644,400.15, 889,294.51 and 357,946.89 is: 493,979.10

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,400.15 : 889,294.51 = 357,946.89 : x
  2. Step 2: Convert to fraction form
    644,400.15/889,294.51 = 357,946.89/x
  3. Step 3: Cross multiply
    644,400.15x = 889,294.51 × 357,946.89
  4. Step 4: Simplify right side
    644,400.15x = 318,320,204,148.57
  5. Step 5: Solve for x
    x = 318,320,204,148.57/644,400.15
  6. Step 6: Final answer
    x = 493,979.10

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Double scale
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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.