Home / 551,681.40-761,319.18-309,970.20

Finding the Fourth Proportional to 551,681.40, 761,319.18 and 309,970.20

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Solution

The fourth proportional to 551,681.40, 761,319.18 and 309,970.20 is: 427,758.23

Step by Step Solution

  1. Step 1: Write the proportion equation
    551,681.40 : 761,319.18 = 309,970.20 : x
  2. Step 2: Convert to fraction form
    551,681.40/761,319.18 = 309,970.20/x
  3. Step 3: Cross multiply
    551,681.40x = 761,319.18 × 309,970.20
  4. Step 4: Simplify right side
    551,681.40x = 235,986,258,488.44
  5. Step 5: Solve for x
    x = 235,986,258,488.44/551,681.40
  6. Step 6: Final answer
    x = 427,758.23

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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.