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Finding the Fourth Proportional to 917,168.40, 1,375,752.60 and 418,532.40

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Solution

The fourth proportional to 917,168.40, 1,375,752.60 and 418,532.40 is: 627,798.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    917,168.40 : 1,375,752.60 = 418,532.40 : x
  2. Step 2: Convert to fraction form
    917,168.40/1,375,752.60 = 418,532.40/x
  3. Step 3: Cross multiply
    917,168.40x = 1,375,752.60 × 418,532.40
  4. Step 4: Simplify right side
    917,168.40x = 575,797,037,484.24
  5. Step 5: Solve for x
    x = 575,797,037,484.24/917,168.40
  6. Step 6: Final answer
    x = 627,798.60

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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.