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Finding the Fourth Proportional to 704,440.64, 972,128.08 and 402,641.12

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Solution

The fourth proportional to 704,440.64, 972,128.08 and 402,641.12 is: 555,644.74

Step by Step Solution

  1. Step 1: Write the proportion equation
    704,440.64 : 972,128.08 = 402,641.12 : x
  2. Step 2: Convert to fraction form
    704,440.64/972,128.08 = 402,641.12/x
  3. Step 3: Cross multiply
    704,440.64x = 972,128.08 × 402,641.12
  4. Step 4: Simplify right side
    704,440.64x = 391,418,738,914.65
  5. Step 5: Solve for x
    x = 391,418,738,914.65/704,440.64
  6. Step 6: Final answer
    x = 555,644.74

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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.