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Finding the Fourth Proportional to 551,131.62, 760,605.60 and 309,430.08

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Solution

The fourth proportional to 551,131.62, 760,605.60 and 309,430.08 is: 427,038.19

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,131.62 : 760,605.60 = 309,430.08 : x
  2. Step 2: Convert to fraction form
    551,131.62/760,605.60 = 309,430.08/x
  3. Step 3: Cross multiply
    551,131.62x = 760,605.60 × 309,430.08
  4. Step 4: Simplify right side
    551,131.62x = 235,354,251,656.45
  5. Step 5: Solve for x
    x = 235,354,251,656.45/551,131.62
  6. Step 6: Final answer
    x = 427,038.19

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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.