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Finding the Fourth Proportional to 478,776.48, 660,681.54 and 263,918.40

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Solution

The fourth proportional to 478,776.48, 660,681.54 and 263,918.40 is: 364,190.85

Step by Step Solution

  1. Step 1: Write the proportion equation
    478,776.48 : 660,681.54 = 263,918.40 : x
  2. Step 2: Convert to fraction form
    478,776.48/660,681.54 = 263,918.40/x
  3. Step 3: Cross multiply
    478,776.48x = 660,681.54 × 263,918.40
  4. Step 4: Simplify right side
    478,776.48x = 174,366,014,946.34
  5. Step 5: Solve for x
    x = 174,366,014,946.34/478,776.48
  6. Step 6: Final answer
    x = 364,190.85

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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.