Home / 390,924.18-539,526.25-218,907.65

Finding the Fourth Proportional to 390,924.18, 539,526.25 and 218,907.65

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Solution

The fourth proportional to 390,924.18, 539,526.25 and 218,907.65 is: 302,121.05

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,924.18 : 539,526.25 = 218,907.65 : x
  2. Step 2: Convert to fraction form
    390,924.18/539,526.25 = 218,907.65/x
  3. Step 3: Cross multiply
    390,924.18x = 539,526.25 × 218,907.65
  4. Step 4: Simplify right side
    390,924.18x = 118,106,423,500.81
  5. Step 5: Solve for x
    x = 118,106,423,500.81/390,924.18
  6. Step 6: Final answer
    x = 302,121.05

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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.