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Finding the Fourth Proportional to 522,518.54, 721,142.28 and 307,678.52

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Solution

The fourth proportional to 522,518.54, 721,142.28 and 307,678.52 is: 424,635.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,518.54 : 721,142.28 = 307,678.52 : x
  2. Step 2: Convert to fraction form
    522,518.54/721,142.28 = 307,678.52/x
  3. Step 3: Cross multiply
    522,518.54x = 721,142.28 × 307,678.52
  4. Step 4: Simplify right side
    522,518.54x = 221,879,989,419.83
  5. Step 5: Solve for x
    x = 221,879,989,419.83/522,518.54
  6. Step 6: Final answer
    x = 424,635.63

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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.