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Finding the Fourth Proportional to 626,570.38, 864,643.86 and 340,084.30

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Solution

The fourth proportional to 626,570.38, 864,643.86 and 340,084.30 is: 469,303.71

Step by Step Solution

  1. Step 1: Write the proportion equation
    626,570.38 : 864,643.86 = 340,084.30 : x
  2. Step 2: Convert to fraction form
    626,570.38/864,643.86 = 340,084.30/x
  3. Step 3: Cross multiply
    626,570.38x = 864,643.86 × 340,084.30
  4. Step 4: Simplify right side
    626,570.38x = 294,051,801,877.40
  5. Step 5: Solve for x
    x = 294,051,801,877.40/626,570.38
  6. Step 6: Final answer
    x = 469,303.71

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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.