Home / 403,938.40-605,518.80-313,931.20

Finding the Fourth Proportional to 403,938.40, 605,518.80 and 313,931.20

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Solution

The fourth proportional to 403,938.40, 605,518.80 and 313,931.20 is: 470,594.63

Step by Step Solution

  1. Step 1: Write the proportion equation
    403,938.40 : 605,518.80 = 313,931.20 : x
  2. Step 2: Convert to fraction form
    403,938.40/605,518.80 = 313,931.20/x
  3. Step 3: Cross multiply
    403,938.40x = 605,518.80 × 313,931.20
  4. Step 4: Simplify right side
    403,938.40x = 190,091,243,506.56
  5. Step 5: Solve for x
    x = 190,091,243,506.56/403,938.40
  6. Step 6: Final answer
    x = 470,594.63

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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.