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Finding the Fourth Proportional to 525,132.40, 787,115.40 and 288,644.80

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Solution

The fourth proportional to 525,132.40, 787,115.40 and 288,644.80 is: 432,646.64

Step by Step Solution

  1. Step 1: Write the proportion equation
    525,132.40 : 787,115.40 = 288,644.80 : x
  2. Step 2: Convert to fraction form
    525,132.40/787,115.40 = 288,644.80/x
  3. Step 3: Cross multiply
    525,132.40x = 787,115.40 × 288,644.80
  4. Step 4: Simplify right side
    525,132.40x = 227,196,767,209.92
  5. Step 5: Solve for x
    x = 227,196,767,209.92/525,132.40
  6. Step 6: Final answer
    x = 432,646.64

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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.