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Finding the Fourth Proportional to 709,171.20, 977,443.20 and 555,206.40

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Solution

The fourth proportional to 709,171.20, 977,443.20 and 555,206.40 is: 765,235.14

Step by Step Solution

  1. Step 1: Write the proportion equation
    709,171.20 : 977,443.20 = 555,206.40 : x
  2. Step 2: Convert to fraction form
    709,171.20/977,443.20 = 555,206.40/x
  3. Step 3: Cross multiply
    709,171.20x = 977,443.20 × 555,206.40
  4. Step 4: Simplify right side
    709,171.20x = 542,682,720,276.48
  5. Step 5: Solve for x
    x = 542,682,720,276.48/709,171.20
  6. Step 6: Final answer
    x = 765,235.14

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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.