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Finding the Fourth Proportional to 457,218.30, 630,898.76 and 253,218.86

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Solution

The fourth proportional to 457,218.30, 630,898.76 and 253,218.86 is: 349,407.42

Step by Step Solution

  1. Step 1: Write the proportion equation
    457,218.30 : 630,898.76 = 253,218.86 : x
  2. Step 2: Convert to fraction form
    457,218.30/630,898.76 = 253,218.86/x
  3. Step 3: Cross multiply
    457,218.30x = 630,898.76 × 253,218.86
  4. Step 4: Simplify right side
    457,218.30x = 159,755,464,782.61
  5. Step 5: Solve for x
    x = 159,755,464,782.61/457,218.30
  6. Step 6: Final answer
    x = 349,407.42

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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.