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Finding the Fourth Proportional to 555,145.60, 766,104.64 and 310,130.24

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Solution

The fourth proportional to 555,145.60, 766,104.64 and 310,130.24 is: 427,981.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,145.60 : 766,104.64 = 310,130.24 : x
  2. Step 2: Convert to fraction form
    555,145.60/766,104.64 = 310,130.24/x
  3. Step 3: Cross multiply
    555,145.60x = 766,104.64 × 310,130.24
  4. Step 4: Simplify right side
    555,145.60x = 237,592,215,868.31
  5. Step 5: Solve for x
    x = 237,592,215,868.31/555,145.60
  6. Step 6: Final answer
    x = 427,981.80

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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.