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Finding the Fourth Proportional to 319,125.60, 478,688.40 and 262,044.90

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Solution

The fourth proportional to 319,125.60, 478,688.40 and 262,044.90 is: 393,067.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,125.60 : 478,688.40 = 262,044.90 : x
  2. Step 2: Convert to fraction form
    319,125.60/478,688.40 = 262,044.90/x
  3. Step 3: Cross multiply
    319,125.60x = 478,688.40 × 262,044.90
  4. Step 4: Simplify right side
    319,125.60x = 125,437,853,909.16
  5. Step 5: Solve for x
    x = 125,437,853,909.16/319,125.60
  6. Step 6: Final answer
    x = 393,067.35

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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.