Home / 648,436.20-972,071.10-423,904.20

Finding the Fourth Proportional to 648,436.20, 972,071.10 and 423,904.20

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Solution

The fourth proportional to 648,436.20, 972,071.10 and 423,904.20 is: 635,475.04

Step by Step Solution

  1. Step 1: Write the proportion equation
    648,436.20 : 972,071.10 = 423,904.20 : x
  2. Step 2: Convert to fraction form
    648,436.20/972,071.10 = 423,904.20/x
  3. Step 3: Cross multiply
    648,436.20x = 972,071.10 × 423,904.20
  4. Step 4: Simplify right side
    648,436.20x = 412,065,021,988.62
  5. Step 5: Solve for x
    x = 412,065,021,988.62/648,436.20
  6. Step 6: Final answer
    x = 635,475.04

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Double scale
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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.