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Finding the Fourth Proportional to 387,587.04, 534,805.32 and 215,500.20

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Solution

The fourth proportional to 387,587.04, 534,805.32 and 215,500.20 is: 297,354.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    387,587.04 : 534,805.32 = 215,500.20 : x
  2. Step 2: Convert to fraction form
    387,587.04/534,805.32 = 215,500.20/x
  3. Step 3: Cross multiply
    387,587.04x = 534,805.32 × 215,500.20
  4. Step 4: Simplify right side
    387,587.04x = 115,250,653,421.06
  5. Step 5: Solve for x
    x = 115,250,653,421.06/387,587.04
  6. Step 6: Final answer
    x = 297,354.25

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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.