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Finding the Fourth Proportional to 485,417.40, 727,607.70 and 185,782.20

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Solution

The fourth proportional to 485,417.40, 727,607.70 and 185,782.20 is: 278,474.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    485,417.40 : 727,607.70 = 185,782.20 : x
  2. Step 2: Convert to fraction form
    485,417.40/727,607.70 = 185,782.20/x
  3. Step 3: Cross multiply
    485,417.40x = 727,607.70 × 185,782.20
  4. Step 4: Simplify right side
    485,417.40x = 135,176,559,242.94
  5. Step 5: Solve for x
    x = 135,176,559,242.94/485,417.40
  6. Step 6: Final answer
    x = 278,474.89

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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.