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Finding the Fourth Proportional to 440,416.48, 607,603.80 and 311,544.40

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Solution

The fourth proportional to 440,416.48, 607,603.80 and 311,544.40 is: 429,810.35

Step by Step Solution

  1. Step 1: Write the proportion equation
    440,416.48 : 607,603.80 = 311,544.40 : x
  2. Step 2: Convert to fraction form
    440,416.48/607,603.80 = 311,544.40/x
  3. Step 3: Cross multiply
    440,416.48x = 607,603.80 × 311,544.40
  4. Step 4: Simplify right side
    440,416.48x = 189,295,561,308.72
  5. Step 5: Solve for x
    x = 189,295,561,308.72/440,416.48
  6. Step 6: Final answer
    x = 429,810.35

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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.