Home / 390,176.40-584,827.20-221,777.40

Finding the Fourth Proportional to 390,176.40, 584,827.20 and 221,777.40

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Solution

The fourth proportional to 390,176.40, 584,827.20 and 221,777.40 is: 332,417.48

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,176.40 : 584,827.20 = 221,777.40 : x
  2. Step 2: Convert to fraction form
    390,176.40/584,827.20 = 221,777.40/x
  3. Step 3: Cross multiply
    390,176.40x = 584,827.20 × 221,777.40
  4. Step 4: Simplify right side
    390,176.40x = 129,701,455,865.28
  5. Step 5: Solve for x
    x = 129,701,455,865.28/390,176.40
  6. Step 6: Final answer
    x = 332,417.48

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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.