Home / 645,531.86-890,831.59-359,051.95

Finding the Fourth Proportional to 645,531.86, 890,831.59 and 359,051.95

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Solution

The fourth proportional to 645,531.86, 890,831.59 and 359,051.95 is: 495,490.37

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,531.86 : 890,831.59 = 359,051.95 : x
  2. Step 2: Convert to fraction form
    645,531.86/890,831.59 = 359,051.95/x
  3. Step 3: Cross multiply
    645,531.86x = 890,831.59 × 359,051.95
  4. Step 4: Simplify right side
    645,531.86x = 319,854,819,511.10
  5. Step 5: Solve for x
    x = 319,854,819,511.10/645,531.86
  6. Step 6: Final answer
    x = 495,490.37

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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.