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Finding the Fourth Proportional to 688,730.04, 950,431.86 and 398,319.66

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Solution

The fourth proportional to 688,730.04, 950,431.86 and 398,319.66 is: 549,672.11

Step by Step Solution

  1. Step 1: Write the proportion equation
    688,730.04 : 950,431.86 = 398,319.66 : x
  2. Step 2: Convert to fraction form
    688,730.04/950,431.86 = 398,319.66/x
  3. Step 3: Cross multiply
    688,730.04x = 950,431.86 × 398,319.66
  4. Step 4: Simplify right side
    688,730.04x = 378,575,695,328.37
  5. Step 5: Solve for x
    x = 378,575,695,328.37/688,730.04
  6. Step 6: Final answer
    x = 549,672.11

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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.