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Finding the Fourth Proportional to 346,543.20, 519,814.80 and 212,990.40

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Solution

The fourth proportional to 346,543.20, 519,814.80 and 212,990.40 is: 319,485.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,543.20 : 519,814.80 = 212,990.40 : x
  2. Step 2: Convert to fraction form
    346,543.20/519,814.80 = 212,990.40/x
  3. Step 3: Cross multiply
    346,543.20x = 519,814.80 × 212,990.40
  4. Step 4: Simplify right side
    346,543.20x = 110,715,562,177.92
  5. Step 5: Solve for x
    x = 110,715,562,177.92/346,543.20
  6. Step 6: Final answer
    x = 319,485.60

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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.