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Finding the Fourth Proportional to 657,974.80, 987,221.40 and 258,547.60

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Solution

The fourth proportional to 657,974.80, 987,221.40 and 258,547.60 is: 387,923.25

Step by Step Solution

  1. Step 1: Write the proportion equation
    657,974.80 : 987,221.40 = 258,547.60 : x
  2. Step 2: Convert to fraction form
    657,974.80/987,221.40 = 258,547.60/x
  3. Step 3: Cross multiply
    657,974.80x = 987,221.40 × 258,547.60
  4. Step 4: Simplify right side
    657,974.80x = 255,243,723,638.64
  5. Step 5: Solve for x
    x = 255,243,723,638.64/657,974.80
  6. Step 6: Final answer
    x = 387,923.25

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Double scale
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1.5x scale

Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.