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Finding the Fourth Proportional to 319,532.70, 478,715.85 and 260,046.30

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Solution

The fourth proportional to 319,532.70, 478,715.85 and 260,046.30 is: 389,594.82

Step by Step Solution

  1. Step 1: Write the proportion equation
    319,532.70 : 478,715.85 = 260,046.30 : x
  2. Step 2: Convert to fraction form
    319,532.70/478,715.85 = 260,046.30/x
  3. Step 3: Cross multiply
    319,532.70x = 478,715.85 × 260,046.30
  4. Step 4: Simplify right side
    319,532.70x = 124,488,285,543.86
  5. Step 5: Solve for x
    x = 124,488,285,543.86/319,532.70
  6. Step 6: Final answer
    x = 389,594.82

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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.