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Finding the Fourth Proportional to 440,005.20, 660,007.80 and 316,510.80

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Solution

The fourth proportional to 440,005.20, 660,007.80 and 316,510.80 is: 474,766.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,005.20 : 660,007.80 = 316,510.80 : x
  2. Step 2: Convert to fraction form
    440,005.20/660,007.80 = 316,510.80/x
  3. Step 3: Cross multiply
    440,005.20x = 660,007.80 × 316,510.80
  4. Step 4: Simplify right side
    440,005.20x = 208,899,596,784.24
  5. Step 5: Solve for x
    x = 208,899,596,784.24/440,005.20
  6. Step 6: Final answer
    x = 474,766.20

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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.