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Finding the Fourth Proportional to 390,586.08, 539,017.92 and 220,830.24

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Solution

The fourth proportional to 390,586.08, 539,017.92 and 220,830.24 is: 304,750.89

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,586.08 : 539,017.92 = 220,830.24 : x
  2. Step 2: Convert to fraction form
    390,586.08/539,017.92 = 220,830.24/x
  3. Step 3: Cross multiply
    390,586.08x = 539,017.92 × 220,830.24
  4. Step 4: Simplify right side
    390,586.08x = 119,031,456,637.90
  5. Step 5: Solve for x
    x = 119,031,456,637.90/390,586.08
  6. Step 6: Final answer
    x = 304,750.89

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1.5x scale

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.