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Finding the Fourth Proportional to 644,605.59, 889,503.56 and 372,690.93

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Solution

The fourth proportional to 644,605.59, 889,503.56 and 372,690.93 is: 514,283.32

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,605.59 : 889,503.56 = 372,690.93 : x
  2. Step 2: Convert to fraction form
    644,605.59/889,503.56 = 372,690.93/x
  3. Step 3: Cross multiply
    644,605.59x = 889,503.56 × 372,690.93
  4. Step 4: Simplify right side
    644,605.59x = 331,509,902,703.74
  5. Step 5: Solve for x
    x = 331,509,902,703.74/644,605.59
  6. Step 6: Final answer
    x = 514,283.32

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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.