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Finding the Fourth Proportional to 654,143.85, 903,075.89 and 396,064.89

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Solution

The fourth proportional to 654,143.85, 903,075.89 and 396,064.89 is: 546,785.93

Step by Step Solution

  1. Step 1: Write the proportion equation
    654,143.85 : 903,075.89 = 396,064.89 : x
  2. Step 2: Convert to fraction form
    654,143.85/903,075.89 = 396,064.89/x
  3. Step 3: Cross multiply
    654,143.85x = 903,075.89 × 396,064.89
  4. Step 4: Simplify right side
    654,143.85x = 357,676,651,054.18
  5. Step 5: Solve for x
    x = 357,676,651,054.18/654,143.85
  6. Step 6: Final answer
    x = 546,785.93

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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.