Home / 645,525.48-890,812.38-359,039.40

Finding the Fourth Proportional to 645,525.48, 890,812.38 and 359,039.40

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Solution

The fourth proportional to 645,525.48, 890,812.38 and 359,039.40 is: 495,467.26

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,525.48 : 890,812.38 = 359,039.40 : x
  2. Step 2: Convert to fraction form
    645,525.48/890,812.38 = 359,039.40/x
  3. Step 3: Cross multiply
    645,525.48x = 890,812.38 × 359,039.40
  4. Step 4: Simplify right side
    645,525.48x = 319,836,742,427.77
  5. Step 5: Solve for x
    x = 319,836,742,427.77/645,525.48
  6. Step 6: Final answer
    x = 495,467.26

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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.