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Finding the Fourth Proportional to 713,844, 985,058.64 and 391,485.60

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Solution

The fourth proportional to 713,844, 985,058.64 and 391,485.60 is: 540,224.86

Step by Step Solution

  1. Step 1: Write the proportion equation
    713,844 : 985,058.64 = 391,485.60 : x
  2. Step 2: Convert to fraction form
    713,844/985,058.64 = 391,485.60/x
  3. Step 3: Cross multiply
    713,844x = 985,058.64 × 391,485.60
  4. Step 4: Simplify right side
    713,844x = 385,636,272,715.58
  5. Step 5: Solve for x
    x = 385,636,272,715.58/713,844
  6. Step 6: Final answer
    x = 540,224.86

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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.