Home / 742,509.40-1,113,764.10-518,123.20

Finding the Fourth Proportional to 742,509.40, 1,113,764.10 and 518,123.20

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Solution

The fourth proportional to 742,509.40, 1,113,764.10 and 518,123.20 is: 777,184.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    742,509.40 : 1,113,764.10 = 518,123.20 : x
  2. Step 2: Convert to fraction form
    742,509.40/1,113,764.10 = 518,123.20/x
  3. Step 3: Cross multiply
    742,509.40x = 1,113,764.10 × 518,123.20
  4. Step 4: Simplify right side
    742,509.40x = 577,067,019,537.12
  5. Step 5: Solve for x
    x = 577,067,019,537.12/742,509.40
  6. Step 6: Final answer
    x = 777,184.80

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Double scale
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Similar ratio
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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.