Home / 390,528.18-538,952.13-220,778.10

Finding the Fourth Proportional to 390,528.18, 538,952.13 and 220,778.10

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Solution

The fourth proportional to 390,528.18, 538,952.13 and 220,778.10 is: 304,686.92

Step by Step Solution

  1. Step 1: Write the proportion equation
    390,528.18 : 538,952.13 = 220,778.10 : x
  2. Step 2: Convert to fraction form
    390,528.18/538,952.13 = 220,778.10/x
  3. Step 3: Cross multiply
    390,528.18x = 538,952.13 × 220,778.10
  4. Step 4: Simplify right side
    390,528.18x = 118,988,827,252.35
  5. Step 5: Solve for x
    x = 118,988,827,252.35/390,528.18
  6. Step 6: Final answer
    x = 304,686.92

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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.