Home / 715,827.40-987,848.24-389,141.04

Finding the Fourth Proportional to 715,827.40, 987,848.24 and 389,141.04

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Solution

The fourth proportional to 715,827.40, 987,848.24 and 389,141.04 is: 537,018.13

Step by Step Solution

  1. Step 1: Write the proportion equation
    715,827.40 : 987,848.24 = 389,141.04 : x
  2. Step 2: Convert to fraction form
    715,827.40/987,848.24 = 389,141.04/x
  3. Step 3: Cross multiply
    715,827.40x = 987,848.24 × 389,141.04
  4. Step 4: Simplify right side
    715,827.40x = 384,412,291,475.77
  5. Step 5: Solve for x
    x = 384,412,291,475.77/715,827.40
  6. Step 6: Final answer
    x = 537,018.13

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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.