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Finding the Fourth Proportional to 346,412.60, 519,618.90 and 212,859.80

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Solution

The fourth proportional to 346,412.60, 519,618.90 and 212,859.80 is: 319,289.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    346,412.60 : 519,618.90 = 212,859.80 : x
  2. Step 2: Convert to fraction form
    346,412.60/519,618.90 = 212,859.80/x
  3. Step 3: Cross multiply
    346,412.60x = 519,618.90 × 212,859.80
  4. Step 4: Simplify right side
    346,412.60x = 110,605,975,130.22
  5. Step 5: Solve for x
    x = 110,605,975,130.22/346,412.60
  6. Step 6: Final answer
    x = 319,289.70

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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.