Home / 644,278.86-889,080.45-357,817.40

Finding the Fourth Proportional to 644,278.86, 889,080.45 and 357,817.40

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Solution

The fourth proportional to 644,278.86, 889,080.45 and 357,817.40 is: 493,774.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,278.86 : 889,080.45 = 357,817.40 : x
  2. Step 2: Convert to fraction form
    644,278.86/889,080.45 = 357,817.40/x
  3. Step 3: Cross multiply
    644,278.86x = 889,080.45 × 357,817.40
  4. Step 4: Simplify right side
    644,278.86x = 318,128,454,569.39
  5. Step 5: Solve for x
    x = 318,128,454,569.39/644,278.86
  6. Step 6: Final answer
    x = 493,774.47

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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.