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Finding the Fourth Proportional to 538,666.40, 807,999.60 and 258,039.20

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Solution

The fourth proportional to 538,666.40, 807,999.60 and 258,039.20 is: 387,058.80

Step by Step Solution

  1. Step 1: Write the proportion equation
    538,666.40 : 807,999.60 = 258,039.20 : x
  2. Step 2: Convert to fraction form
    538,666.40/807,999.60 = 258,039.20/x
  3. Step 3: Cross multiply
    538,666.40x = 807,999.60 × 258,039.20
  4. Step 4: Simplify right side
    538,666.40x = 208,495,570,384.32
  5. Step 5: Solve for x
    x = 208,495,570,384.32/538,666.40
  6. Step 6: Final answer
    x = 387,058.80

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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.