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Finding the Fourth Proportional to 657,848.40, 907,830.72 and 356,042.40

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Solution

The fourth proportional to 657,848.40, 907,830.72 and 356,042.40 is: 491,338.47

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,848.40 : 907,830.72 = 356,042.40 : x
  2. Step 2: Convert to fraction form
    657,848.40/907,830.72 = 356,042.40/x
  3. Step 3: Cross multiply
    657,848.40x = 907,830.72 × 356,042.40
  4. Step 4: Simplify right side
    657,848.40x = 323,226,228,342.53
  5. Step 5: Solve for x
    x = 323,226,228,342.53/657,848.40
  6. Step 6: Final answer
    x = 491,338.47

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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.