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Finding the Fourth Proportional to 645,088.34, 890,228.40 and 354,715.22

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Solution

The fourth proportional to 645,088.34, 890,228.40 and 354,715.22 is: 489,510.57

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,088.34 : 890,228.40 = 354,715.22 : x
  2. Step 2: Convert to fraction form
    645,088.34/890,228.40 = 354,715.22/x
  3. Step 3: Cross multiply
    645,088.34x = 890,228.40 × 354,715.22
  4. Step 4: Simplify right side
    645,088.34x = 315,777,562,756.25
  5. Step 5: Solve for x
    x = 315,777,562,756.25/645,088.34
  6. Step 6: Final answer
    x = 489,510.57

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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.