Home / 651,075.20-976,612.80-399,132.80

Finding the Fourth Proportional to 651,075.20, 976,612.80 and 399,132.80

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Solution

The fourth proportional to 651,075.20, 976,612.80 and 399,132.80 is: 598,699.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    651,075.20 : 976,612.80 = 399,132.80 : x
  2. Step 2: Convert to fraction form
    651,075.20/976,612.80 = 399,132.80/x
  3. Step 3: Cross multiply
    651,075.20x = 976,612.80 × 399,132.80
  4. Step 4: Simplify right side
    651,075.20x = 389,798,201,379.84
  5. Step 5: Solve for x
    x = 389,798,201,379.84/651,075.20
  6. Step 6: Final answer
    x = 598,699.20

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Half scale
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Double scale
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Similar ratio
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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.