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Finding the Fourth Proportional to 578,642.77, 798,518.59 and 320,518.86

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Solution

The fourth proportional to 578,642.77, 798,518.59 and 320,518.86 is: 442,311.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    578,642.77 : 798,518.59 = 320,518.86 : x
  2. Step 2: Convert to fraction form
    578,642.77/798,518.59 = 320,518.86/x
  3. Step 3: Cross multiply
    578,642.77x = 798,518.59 × 320,518.86
  4. Step 4: Simplify right side
    578,642.77x = 255,940,264,359.87
  5. Step 5: Solve for x
    x = 255,940,264,359.87/578,642.77
  6. Step 6: Final answer
    x = 442,311.35

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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.