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Finding the Fourth Proportional to 410,155.80, 615,233.70 and 390,802.20

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Solution

The fourth proportional to 410,155.80, 615,233.70 and 390,802.20 is: 586,203.30

Step by Step Solution

  1. Step 1: Write the proportion equation
    410,155.80 : 615,233.70 = 390,802.20 : x
  2. Step 2: Convert to fraction form
    410,155.80/615,233.70 = 390,802.20/x
  3. Step 3: Cross multiply
    410,155.80x = 615,233.70 × 390,802.20
  4. Step 4: Simplify right side
    410,155.80x = 240,434,683,474.14
  5. Step 5: Solve for x
    x = 240,434,683,474.14/410,155.80
  6. Step 6: Final answer
    x = 586,203.30

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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.