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Finding the Fourth Proportional to 319,092.10, 478,638.15 and 260,043.10

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Solution

The fourth proportional to 319,092.10, 478,638.15 and 260,043.10 is: 390,064.65

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,092.10 : 478,638.15 = 260,043.10 : x
  2. Step 2: Convert to fraction form
    319,092.10/478,638.15 = 260,043.10/x
  3. Step 3: Cross multiply
    319,092.10x = 478,638.15 × 260,043.10
  4. Step 4: Simplify right side
    319,092.10x = 124,466,548,304.27
  5. Step 5: Solve for x
    x = 124,466,548,304.27/319,092.10
  6. Step 6: Final answer
    x = 390,064.65

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.