Home / 644,970.79-890,040.03-369,319.69

Finding the Fourth Proportional to 644,970.79, 890,040.03 and 369,319.69

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Solution

The fourth proportional to 644,970.79, 890,040.03 and 369,319.69 is: 509,649.91

Step by Step Solution

  1. Step 1: Write the proportion equation
    644,970.79 : 890,040.03 = 369,319.69 : x
  2. Step 2: Convert to fraction form
    644,970.79/890,040.03 = 369,319.69/x
  3. Step 3: Cross multiply
    644,970.79x = 890,040.03 × 369,319.69
  4. Step 4: Simplify right side
    644,970.79x = 328,709,307,967.19
  5. Step 5: Solve for x
    x = 328,709,307,967.19/644,970.79
  6. Step 6: Final answer
    x = 509,649.91

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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.