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Finding the Fourth Proportional to 530,479.28, 732,070.72 and 288,768.80

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Solution

The fourth proportional to 530,479.28, 732,070.72 and 288,768.80 is: 398,506.01

Step by Step Solution

  1. Step 1: Write the proportion equation
    530,479.28 : 732,070.72 = 288,768.80 : x
  2. Step 2: Convert to fraction form
    530,479.28/732,070.72 = 288,768.80/x
  3. Step 3: Cross multiply
    530,479.28x = 732,070.72 × 288,768.80
  4. Step 4: Simplify right side
    530,479.28x = 211,399,183,329.54
  5. Step 5: Solve for x
    x = 211,399,183,329.54/530,479.28
  6. Step 6: Final answer
    x = 398,506.01

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.38) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.