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Finding the Fourth Proportional to 644,733.42, 889,740.99 and 358,248.30

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Solution

The fourth proportional to 644,733.42, 889,740.99 and 358,248.30 is: 494,387.58

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,733.42 : 889,740.99 = 358,248.30 : x
  2. Step 2: Convert to fraction form
    644,733.42/889,740.99 = 358,248.30/x
  3. Step 3: Cross multiply
    644,733.42x = 889,740.99 × 358,248.30
  4. Step 4: Simplify right side
    644,733.42x = 318,748,197,107.82
  5. Step 5: Solve for x
    x = 318,748,197,107.82/644,733.42
  6. Step 6: Final answer
    x = 494,387.58

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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.