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Finding the Fourth Proportional to 543,040.12, 749,431.18 and 313,607.04

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Solution

The fourth proportional to 543,040.12, 749,431.18 and 313,607.04 is: 432,798.40

Step by Step Solution

  1. Step 1: Write the proportion equation
    543,040.12 : 749,431.18 = 313,607.04 : x
  2. Step 2: Convert to fraction form
    543,040.12/749,431.18 = 313,607.04/x
  3. Step 3: Cross multiply
    543,040.12x = 749,431.18 × 313,607.04
  4. Step 4: Simplify right side
    543,040.12x = 235,026,894,043.51
  5. Step 5: Solve for x
    x = 235,026,894,043.51/543,040.12
  6. Step 6: Final answer
    x = 432,798.40

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Double scale
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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.