Home / 430,108.90-645,294.56-219,894.46

Finding the Fourth Proportional to 430,108.90, 645,294.56 and 219,894.46

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Solution

The fourth proportional to 430,108.90, 645,294.56 and 219,894.46 is: 329,908.77

Step by Step Solution

  1. Step 1: Write the proportion equation
    430,108.90 : 645,294.56 = 219,894.46 : x
  2. Step 2: Convert to fraction form
    430,108.90/645,294.56 = 219,894.46/x
  3. Step 3: Cross multiply
    430,108.90x = 645,294.56 × 219,894.46
  4. Step 4: Simplify right side
    430,108.90x = 141,896,698,812.14
  5. Step 5: Solve for x
    x = 141,896,698,812.14/430,108.90
  6. Step 6: Final answer
    x = 329,908.77

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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.