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Finding the Fourth Proportional to 606,621.20, 909,931.80 and 417,664.40

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Solution

The fourth proportional to 606,621.20, 909,931.80 and 417,664.40 is: 626,496.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    606,621.20 : 909,931.80 = 417,664.40 : x
  2. Step 2: Convert to fraction form
    606,621.20/909,931.80 = 417,664.40/x
  3. Step 3: Cross multiply
    606,621.20x = 909,931.80 × 417,664.40
  4. Step 4: Simplify right side
    606,621.20x = 380,046,119,287.92
  5. Step 5: Solve for x
    x = 380,046,119,287.92/606,621.20
  6. Step 6: Final answer
    x = 626,496.60

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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.