Home / 645,280.36-890,507.46-358,812.52

Finding the Fourth Proportional to 645,280.36, 890,507.46 and 358,812.52

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Solution

The fourth proportional to 645,280.36, 890,507.46 and 358,812.52 is: 495,172.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,280.36 : 890,507.46 = 358,812.52 : x
  2. Step 2: Convert to fraction form
    645,280.36/890,507.46 = 358,812.52/x
  3. Step 3: Cross multiply
    645,280.36x = 890,507.46 × 358,812.52
  4. Step 4: Simplify right side
    645,280.36x = 319,525,225,801.40
  5. Step 5: Solve for x
    x = 319,525,225,801.40/645,280.36
  6. Step 6: Final answer
    x = 495,172.71

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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.