Home / 644,402.76-889,276.50-357,923.40

Finding the Fourth Proportional to 644,402.76, 889,276.50 and 357,923.40

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Solution

The fourth proportional to 644,402.76, 889,276.50 and 357,923.40 is: 493,934.68

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,402.76 : 889,276.50 = 357,923.40 : x
  2. Step 2: Convert to fraction form
    644,402.76/889,276.50 = 357,923.40/x
  3. Step 3: Cross multiply
    644,402.76x = 889,276.50 × 357,923.40
  4. Step 4: Simplify right side
    644,402.76x = 318,292,868,420.10
  5. Step 5: Solve for x
    x = 318,292,868,420.10/644,402.76
  6. Step 6: Final answer
    x = 493,934.68

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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.