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Finding the Fourth Proportional to 551,113.23, 760,483.75 and 309,340.38

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Solution

The fourth proportional to 551,113.23, 760,483.75 and 309,340.38 is: 426,860.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,113.23 : 760,483.75 = 309,340.38 : x
  2. Step 2: Convert to fraction form
    551,113.23/760,483.75 = 309,340.38/x
  3. Step 3: Cross multiply
    551,113.23x = 760,483.75 × 309,340.38
  4. Step 4: Simplify right side
    551,113.23x = 235,248,332,208.83
  5. Step 5: Solve for x
    x = 235,248,332,208.83/551,113.23
  6. Step 6: Final answer
    x = 426,860.25

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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.