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Finding the Fourth Proportional to 528,987.60, 730,005.96 and 302,642.64

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Solution

The fourth proportional to 528,987.60, 730,005.96 and 302,642.64 is: 417,648.60

Step by Step Solution

  1. Step 1: Write the proportion equation
    528,987.60 : 730,005.96 = 302,642.64 : x
  2. Step 2: Convert to fraction form
    528,987.60/730,005.96 = 302,642.64/x
  3. Step 3: Cross multiply
    528,987.60x = 730,005.96 × 302,642.64
  4. Step 4: Simplify right side
    528,987.60x = 220,930,930,950.13
  5. Step 5: Solve for x
    x = 220,930,930,950.13/528,987.60
  6. Step 6: Final answer
    x = 417,648.60

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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.