Home / 480,020.30-720,030.45-389,818.70

Finding the Fourth Proportional to 480,020.30, 720,030.45 and 389,818.70

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Solution

The fourth proportional to 480,020.30, 720,030.45 and 389,818.70 is: 584,728.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    480,020.30 : 720,030.45 = 389,818.70 : x
  2. Step 2: Convert to fraction form
    480,020.30/720,030.45 = 389,818.70/x
  3. Step 3: Cross multiply
    480,020.30x = 720,030.45 × 389,818.70
  4. Step 4: Simplify right side
    480,020.30x = 280,681,333,979.42
  5. Step 5: Solve for x
    x = 280,681,333,979.42/480,020.30
  6. Step 6: Final answer
    x = 584,728.05

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Similar ratio
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1.5x scale

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.