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Finding the Fourth Proportional to 605,140.40, 907,710.60 and 155,860.40

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Solution

The fourth proportional to 605,140.40, 907,710.60 and 155,860.40 is: 233,790.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    605,140.40 : 907,710.60 = 155,860.40 : x
  2. Step 2: Convert to fraction form
    605,140.40/907,710.60 = 155,860.40/x
  3. Step 3: Cross multiply
    605,140.40x = 907,710.60 × 155,860.40
  4. Step 4: Simplify right side
    605,140.40x = 141,476,137,200.24
  5. Step 5: Solve for x
    x = 141,476,137,200.24/605,140.40
  6. Step 6: Final answer
    x = 233,790.60

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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.