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Finding the Fourth Proportional to 695,915.42, 960,430.50 and 390,043.35

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Solution

The fourth proportional to 695,915.42, 960,430.50 and 390,043.35 is: 538,297.50

Step by Step Solution

  1. Step 1: Write the proportion equation
    695,915.42 : 960,430.50 = 390,043.35 : x
  2. Step 2: Convert to fraction form
    695,915.42/960,430.50 = 390,043.35/x
  3. Step 3: Cross multiply
    695,915.42x = 960,430.50 × 390,043.35
  4. Step 4: Simplify right side
    695,915.42x = 374,609,529,662.18
  5. Step 5: Solve for x
    x = 374,609,529,662.18/695,915.42
  6. Step 6: Final answer
    x = 538,297.50

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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.