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Finding the Fourth Proportional to 656,840.20, 985,649.10 and 478,899.40

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Solution

The fourth proportional to 656,840.20, 985,649.10 and 478,899.40 is: 718,632.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    656,840.20 : 985,649.10 = 478,899.40 : x
  2. Step 2: Convert to fraction form
    656,840.20/985,649.10 = 478,899.40/x
  3. Step 3: Cross multiply
    656,840.20x = 985,649.10 × 478,899.40
  4. Step 4: Simplify right side
    656,840.20x = 472,026,762,600.54
  5. Step 5: Solve for x
    x = 472,026,762,600.54/656,840.20
  6. Step 6: Final answer
    x = 718,632.57

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.