Home / 645,522.48-890,808.24-359,036.40

Finding the Fourth Proportional to 645,522.48, 890,808.24 and 359,036.40

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Solution

The fourth proportional to 645,522.48, 890,808.24 and 359,036.40 is: 495,463.12

Step by Step Solution

  1. Step 1: Write the proportion equation
    645,522.48 : 890,808.24 = 359,036.40 : x
  2. Step 2: Convert to fraction form
    645,522.48/890,808.24 = 359,036.40/x
  3. Step 3: Cross multiply
    645,522.48x = 890,808.24 × 359,036.40
  4. Step 4: Simplify right side
    645,522.48x = 319,832,583,579.94
  5. Step 5: Solve for x
    x = 319,832,583,579.94/645,522.48
  6. Step 6: Final answer
    x = 495,463.12

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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.