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Finding the Fourth Proportional to 522,340.80, 720,820 and 304,590.08

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Solution

The fourth proportional to 522,340.80, 720,820 and 304,590.08 is: 420,328.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    522,340.80 : 720,820 = 304,590.08 : x
  2. Step 2: Convert to fraction form
    522,340.80/720,820 = 304,590.08/x
  3. Step 3: Cross multiply
    522,340.80x = 720,820 × 304,590.08
  4. Step 4: Simplify right side
    522,340.80x = 219,554,621,465.60
  5. Step 5: Solve for x
    x = 219,554,621,465.60/522,340.80
  6. Step 6: Final answer
    x = 420,328.30

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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.