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Finding the Fourth Proportional to 429,430.78, 644,282.25 and 334,984.78

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Solution

The fourth proportional to 429,430.78, 644,282.25 and 334,984.78 is: 502,583.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    429,430.78 : 644,282.25 = 334,984.78 : x
  2. Step 2: Convert to fraction form
    429,430.78/644,282.25 = 334,984.78/x
  3. Step 3: Cross multiply
    429,430.78x = 644,282.25 × 334,984.78
  4. Step 4: Simplify right side
    429,430.78x = 215,824,747,774.16
  5. Step 5: Solve for x
    x = 215,824,747,774.16/429,430.78
  6. Step 6: Final answer
    x = 502,583.32

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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.