Home / 390,865.40-586,298.10-124,623.80

Finding the Fourth Proportional to 390,865.40, 586,298.10 and 124,623.80

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Solution

The fourth proportional to 390,865.40, 586,298.10 and 124,623.80 is: 186,935.70

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,865.40 : 586,298.10 = 124,623.80 : x
  2. Step 2: Convert to fraction form
    390,865.40/586,298.10 = 124,623.80/x
  3. Step 3: Cross multiply
    390,865.40x = 586,298.10 × 124,623.80
  4. Step 4: Simplify right side
    390,865.40x = 73,066,697,154.78
  5. Step 5: Solve for x
    x = 73,066,697,154.78/390,865.40
  6. Step 6: Final answer
    x = 186,935.70

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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.