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Finding the Fourth Proportional to 380,397.96, 570,383.55 and 260,590.23

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Solution

The fourth proportional to 380,397.96, 570,383.55 and 260,590.23 is: 390,739.16

Step by Step Solution

  1. Step 1: Write the proportion equation
    380,397.96 : 570,383.55 = 260,590.23 : x
  2. Step 2: Convert to fraction form
    380,397.96/570,383.55 = 260,590.23/x
  3. Step 3: Cross multiply
    380,397.96x = 570,383.55 × 260,590.23
  4. Step 4: Simplify right side
    380,397.96x = 148,636,380,482.72
  5. Step 5: Solve for x
    x = 148,636,380,482.72/380,397.96
  6. Step 6: Final answer
    x = 390,739.16

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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.