Home / 390,506.04-585,090.30-213,137.52

Finding the Fourth Proportional to 390,506.04, 585,090.30 and 213,137.52

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Solution

The fourth proportional to 390,506.04, 585,090.30 and 213,137.52 is: 319,341.27

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,506.04 : 585,090.30 = 213,137.52 : x
  2. Step 2: Convert to fraction form
    390,506.04/585,090.30 = 213,137.52/x
  3. Step 3: Cross multiply
    390,506.04x = 585,090.30 × 213,137.52
  4. Step 4: Simplify right side
    390,506.04x = 124,704,695,518.06
  5. Step 5: Solve for x
    x = 124,704,695,518.06/390,506.04
  6. Step 6: Final answer
    x = 319,341.27

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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.