Home / 991,487.16-1,487,327.40-317,398.68

Finding the Fourth Proportional to 991,487.16, 1,487,327.40 and 317,398.68

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Solution

The fourth proportional to 991,487.16, 1,487,327.40 and 317,398.68 is: 476,128.96

Step by Step Solution

  1. Step 1: Write the proportion equation
    991,487.16 : 1,487,327.40 = 317,398.68 : x
  2. Step 2: Convert to fraction form
    991,487.16/1,487,327.40 = 317,398.68/x
  3. Step 3: Cross multiply
    991,487.16x = 1,487,327.40 × 317,398.68
  4. Step 4: Simplify right side
    991,487.16x = 472,075,753,487.83
  5. Step 5: Solve for x
    x = 472,075,753,487.83/991,487.16
  6. Step 6: Final answer
    x = 476,128.96

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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.