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Finding the Fourth Proportional to 604,865.30, 907,589.55 and 426,989.30

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Solution

The fourth proportional to 604,865.30, 907,589.55 and 426,989.30 is: 640,689.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    604,865.30 : 907,589.55 = 426,989.30 : x
  2. Step 2: Convert to fraction form
    604,865.30/907,589.55 = 426,989.30/x
  3. Step 3: Cross multiply
    604,865.30x = 907,589.55 × 426,989.30
  4. Step 4: Simplify right side
    604,865.30x = 387,531,026,641.82
  5. Step 5: Solve for x
    x = 387,531,026,641.82/604,865.30
  6. Step 6: Final answer
    x = 640,689.80

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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.