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Finding the Fourth Proportional to 555,570.19, 766,686.90 and 300,921.45

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Solution

The fourth proportional to 555,570.19, 766,686.90 and 300,921.45 is: 415,271.62

Step by Step Solution

  1. Step 1: Write the proportion equation
    555,570.19 : 766,686.90 = 300,921.45 : x
  2. Step 2: Convert to fraction form
    555,570.19/766,686.90 = 300,921.45/x
  3. Step 3: Cross multiply
    555,570.19x = 766,686.90 × 300,921.45
  4. Step 4: Simplify right side
    555,570.19x = 230,712,533,644.01
  5. Step 5: Solve for x
    x = 230,712,533,644.01/555,570.19
  6. Step 6: Final answer
    x = 415,271.62

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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.