Home / 455,223.15-628,254.04-390,905.30

Finding the Fourth Proportional to 455,223.15, 628,254.04 and 390,905.30

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Solution

The fourth proportional to 455,223.15, 628,254.04 and 390,905.30 is: 539,488.88

Step by Step Solution

  1. Step 1: Write the proportion equation
    455,223.15 : 628,254.04 = 390,905.30 : x
  2. Step 2: Convert to fraction form
    455,223.15/628,254.04 = 390,905.30/x
  3. Step 3: Cross multiply
    455,223.15x = 628,254.04 × 390,905.30
  4. Step 4: Simplify right side
    455,223.15x = 245,587,828,886.62
  5. Step 5: Solve for x
    x = 245,587,828,886.62/455,223.15
  6. Step 6: Final answer
    x = 539,488.88

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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.