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Finding the Fourth Proportional to 684,305.76, 944,407.28 and 397,800.80

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Solution

The fourth proportional to 684,305.76, 944,407.28 and 397,800.80 is: 549,003.08

Step by Step Solution

  1. Step 1: Write the proportion equation
    684,305.76 : 944,407.28 = 397,800.80 : x
  2. Step 2: Convert to fraction form
    684,305.76/944,407.28 = 397,800.80/x
  3. Step 3: Cross multiply
    684,305.76x = 944,407.28 × 397,800.80
  4. Step 4: Simplify right side
    684,305.76x = 375,685,971,509.82
  5. Step 5: Solve for x
    x = 375,685,971,509.82/684,305.76
  6. Step 6: Final answer
    x = 549,003.08

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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.