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Finding the Fourth Proportional to 508,999.20, 763,498.80 and 430,267.20

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Solution

The fourth proportional to 508,999.20, 763,498.80 and 430,267.20 is: 645,400.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    508,999.20 : 763,498.80 = 430,267.20 : x
  2. Step 2: Convert to fraction form
    508,999.20/763,498.80 = 430,267.20/x
  3. Step 3: Cross multiply
    508,999.20x = 763,498.80 × 430,267.20
  4. Step 4: Simplify right side
    508,999.20x = 328,508,490,879.36
  5. Step 5: Solve for x
    x = 328,508,490,879.36/508,999.20
  6. Step 6: Final answer
    x = 645,400.80

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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.