Home / 645,325.34-890,570.54-354,949.16

Finding the Fourth Proportional to 645,325.34, 890,570.54 and 354,949.16

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Solution

The fourth proportional to 645,325.34, 890,570.54 and 354,949.16 is: 489,841.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,325.34 : 890,570.54 = 354,949.16 : x
  2. Step 2: Convert to fraction form
    645,325.34/890,570.54 = 354,949.16/x
  3. Step 3: Cross multiply
    645,325.34x = 890,570.54 × 354,949.16
  4. Step 4: Simplify right side
    645,325.34x = 316,107,261,528.27
  5. Step 5: Solve for x
    x = 316,107,261,528.27/645,325.34
  6. Step 6: Final answer
    x = 489,841.70

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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.